REM/Rate Review 2026: Pricing, Pros, Cons, Alternatives

The short verdict on REM/Rate

REM/Rate earns its money with One-to-ten-person HERS rating and residential energy-consulting shops doing new-construction ratings, ENERGY STAR and ZERH certification, and IECC code compliance on single-family and multi-family homes, operating under a RESNET accredited HERS Provider that already holds the license. If that's you, it does the job. The sections below are the parts worth checking before you sign. But the fit is narrower than the marketing suggests, and the price isn't the whole cost.

The vendor publishes no price. But every number below was verified on 7 August 2026 and comes from a named third party that says which.

REM/Rate fit, and where it stops

It fits One-to-ten-person HERS rating and residential energy-consulting shops doing new-construction ratings, ENERGY STAR and ZERH certification, and IECC code compliance on single-family and multi-family homes, operating under a RESNET accredited HERS Provider that already holds the license. That's the half most reviews print. Here's the other half, which is the one worth your time.

Don't buy it if you're A custom home builder of 5 to 50 who wants to bring HERS modelling and ENERGY STAR certification in-house instead of paying a rater per home. You're not eligible to license the product that does that. The full edition is restricted to RESNET accredited HERS Providers, and the edition you can buy, REM/Rate Lite, has had HERS Index, ENERGY STAR Single-Family New Homes and DOE Zero Energy Ready Homes reporting deliberately removed, because DOE and EPA now require a Home Certification Organization to oversee the verifier. So buying Lite and expecting a certificate ends in a disabled or NO PRINT report. Look at A contracted third-party HERS rater working under an accredited Provider instead.

Don't buy it if you're A residential HVAC contractor of 3 to 20 trucks looking for a Manual J load calculation tool to size equipment and satisfy a permit office. REM/Rate does size mechanical equipment, but it's an annual-energy rating engine built around HERS, ERI and IECC compliance, sold through RESNET Providers, priced by nobody publicly, and delivered as a Windows desktop install with no mobile client. And a load-calc tool you can open on a tablet at a replacement job is a different product category, and REM/Rate's own reviewers say the interface and report output are the weak part. Look at A dedicated ACCA-approved Manual J tool instead.

Don't buy it if you're Any shop whose staff work primarily on Macs or in the field on tablets. There's no Mac build, no web version and no mobile app, and the vendor's answer is a Windows emulator. Practitioners including the tool's own best-known trainer have been buying Parallels to run it since 2011, and the published system requirements still reference Internet Explorer 4.0 for the help file. So every rater seat carries a hidden Windows tax. Look at Ekotrope RATER instead.

Don't buy it if you're An energy consultant doing existing-home retrofit work who sells jobs on projected utility savings. The strongest independent validation of REM/Rate covers cooling loads in new ENERGY STAR homes in a hot humid climate. But on older, leaky, poorly insulated housing stock the same analyst says the modelling is poor, one commenter stopped using it for cooling savings projections because it undershot actual savings, and the vendor publishes no accuracy data at all. So building a retrofit pitch on those projections puts your credibility on a number the vendor won't stand behind in public. Look at Billing-history regression against a measured baseline instead.

What you'll pay REM/Rate in year one

There's no published price for REM/Rate. The pricing page asks you to get in touch, so every figure below comes from somewhere other than the vendor, and each one says where.

The vendor's own wording is this, and nothing more: "The vendor publishes no price of any kind. The entire licensing section of the License and Downloads page is a mailto plus a gating notice restricting who may buy at all." So treat every third-party page printing tier names and figures for REM/Rate with careful suspicion. Those numbers are not on the vendor's site today, and a roundup that reprints them is telling you what REM/Rate used to charge somebody else.

And we are not going to print a per-month number we cannot open a page and read. We checked https://www.capterra.com/p/153877/REM-Rate/ (guessed product id, returned HTTP 404; no REM/Rate profile found), https://www.softwareadvice.com/construction/rem-rate-profile/ (HTTP 404, "Sorry, we couldn't find the page you're looking for"), https://www.getapp.com/construction-software/a/rem-rate/ (HTTP 403 to curl), https://www.itqlick.com/rem-rate (HTTP 200 but resolves to a search page reading "No results found for 'rem rate'"), https://www.softwaresuggest.com/rem-rate (HTTP 200, live profile, but the Starting Price field is a lead-capture form with no figure, reviews count is zero, and the vendor is misattributed as "UTC Climate, Controls & Security"), https://www.nehers.org/hers-rater-training (bundles a REM/Rate training licence inside a $3,495.00 course and never breaks the licence out), https://theber.com/services/training-and-certification/hers-rater-training-and-certification/ (bundles "Ekotrope and REM/Rate software training licenses" inside a $3,249 program and never breaks the licence out). No third party anywhere reachable publishes a dollar figure for a REM/Rate licence. The two aggregator listings that exist carry no price at all, and one of them names the wrong company entirely. And the only dollar figures adjacent to REM/Rate are HERS Rater training course fees that bundle a temporary training licence, and quoting those as a REM/Rate price would be wrong by an unknown margin because the course fee also covers instruction, field testing, proctoring and the RESNET exam. So the honest position is that the annual licence fee is unknown, and it's unknown because REM/Rate LLC sells to a small, closed population of RESNET accredited Providers by email, which is a market that has no reason to price publicly. So the absence is the finding: go into the demo knowing that nobody outside the vendor can tell you what you will be quoted, and that any page claiming otherwise is quoting a structure that has moved.

There is no seat you can buy. The license is held annually by a RESNET accredited HERS Provider organisation, which then sub-licenses individual raters working in its program. A rater who is not under a Provider cannot license the full product at all and is routed to REM/Rate Lite, which produces an ERI but no HERS Index. Renewal is an affirmative act on the vendor's server, not a card charge: the installed copy stays expired until the vendor advances the expiration date after payment plus a signed agreement, at which point the rater re-registers from Tools > Web Services.

Everything that isn't the REM/Rate subscription

Payment processing. Not applicable. REM/Rate is a desktop calculation engine, not a billing system. It takes no customer payments and there is no processing rate, because the outputs are rating certificates, code-compliance reports and an inputs-and-outputs database, not invoices.

Implementation and onboarding. Ask sales@remrate.com in writing whether the Provider licence carries a first-year setup, onboarding or training charge separate from the Annual License Fee, and ask your prospective HERS Provider what they add on top when they sub-license a rater seat to you. And both numbers are invisible from outside.

Minimum term. One year, and the year is enforced by an expiration date held on the vendor's server rather than by a contract clause you can read. "REM/Rate™ is available to be licensed annually to RESNET® accredited HERS® Providers." The FAQ makes the mechanic explicit: "Once we have received payment of the Annual License Fee, and a signed Software License Agreement or Amendment (if appropriate), the expiration date will be advanced one year on our web server."

Getting out. The EULA is asymmetric on refunds. If you breach, you get nothing back: "This Agreement will automatically terminate upon your breach of any of this Agreement's terms and conditions. In the event of termination caused by your breach, no refunds or credits will be due." If the vendor walks away, you do get money back: "Licensor may terminate this Agreement without liability upon ten (10) days written notice to you. In the event of any such termination for convenience, Licensor shall pay you a pro rata refund." If YOU walk away mid-term, the clause is silent on money entirely: "You may terminate this Agreement by removing the Software from your device(s)." There is no stated pro rata refund for voluntary customer termination.

Auto-renewal. No auto-renewal, and that is a burden rather than a mercy. Nothing renews by default; the licence simply expires and the software starts warning, then stops. Reinstating it requires the vendor to receive payment AND a signed Software License Agreement or Amendment, then advance the date on their server, then you re-register the installed copy: "REM/Rate™ can be re-registered by selecting Web Services on the Tools Menu." A rating shop that lets the paperwork slip in the middle of a permit deadline has a dead tool, not a lapsed card.

Modules sold separately. . So price the REM/Rate configuration you'll really run rather than the entry tier, because an add-on you need on day one is part of the price.

Third-party services you will also pay for. , , . These are not on REM/Rate's invoice, and they are still part of what this decision costs you every month.

The REM/Rate line items nobody mentions

The subscription is the part everyone quotes. These are the lines that land afterwards, and the ones we could not find are named as unpublished rather than left blank.

Sold separately. . Price the configuration you'll really run, because an add-on you need on day one is part of the price.

Third-party services you'll also pay for. , , . None of these are on REM/Rate's invoice, and all of them are part of what this decision costs every month.

The five workflows you pay for

Feature totals are noise. So a shop in this category lives or dies on five things, and those are the five to grade, and each one below carries the evidence it's graded on.

One hourly simulation engine drives HERS, ERI, code compliance and certification off a single building file You build the house once (envelope, foundation, mechanicals, ducts, DHW, lighting and appliances, solar) and REM/Rate derives loads, consumption, costs and equipment sizing from it, then runs that model against whichever standard you select: ANSI/RESNET/ICC 301-2014, 301-2019 or 301-2022 in the 2025 release, plus IECC 1998 to 2021, NGBS and LEED for Homes. And the User Defined Reference Home feature lets a Provider define local construction practice or local code as the comparison baseline instead of the standard reference.

A report isn't official until a Provider uploads the file and RESNET issues a Registry ID back Uploading runs from Tools > RESNET Building Registry, individually or in batch, and requires a Registry ID and Password that RESNET issues to Providers only. Raters can't upload. And until the building file comes back with a Registry ID, HERS reports print with a Preliminary watermark. Only three rating types can be uploaded (Sampled, Projected Worst Case, Confirmed), and Projected Worst Case additionally demands Property City, Builder Name, Builder Plan/Model Name and Builder Community/Development name before it will go through.

File-based in every direction, with import free and export either metered or aimed at MS Access XML import is documented against a published schema and costs nothing, though the vendor is candid that the schema isn't authoritative. But XML export is a paid item charged per unique building address. Separately there's an Export Database feature that writes inputs and outputs out for statistical analysis and custom reporting, and the release notes show that target is a Microsoft Access database. And portable building files that move between REM/Rate releases, called the Building Interchange File, only arrived in mid-2025.

Renewal is a manual, two-sided paperwork event with a server-side kill switch There's no card on file and no auto-renew. The vendor advances your expiration date on their web server only after receiving the Annual License Fee and a signed Software License Agreement or Amendment. You then re-register the installed copy from Tools > Web Services to pull the new date down. Warnings escalate as expiry approaches. And if either half of the paperwork stalls, the software stops.

A HappyFox knowledge base, two legacy video modules, email and a Google Group Support is a ticket form plus a small knowledge base organised into six sections: Bugs and Accuracy Issues, Code Compliance, Downloads, General Technical Support, REM XML documentation and RESNET Issues. Training is two self-serve video modules the vendor itself frames as still-relevant rather than current. There's no phone number published on the Contact page, only a PO Box, an email link and a ticket link.

How REM/Rate lands by trade

Where your data goes when it leaves REM/Rate

QuickBooks connects, on every plan. Xero, Sage, or any other accounting package connects, on every plan. Your costs map through cost codes, so test yours against your own chart of accounts before you commit. A code your books don't recognise is how a labour charge quietly lands somewhere useless.

Past those, the road ends. Integrations directory, CRM and field-service software (Housecall Pro, ServiceTitan, Jobber and similar), Payment processing, Cloud storage and mobile field capture do not connect. So if your books run on an ERP rather than the platforms named above, weigh that before anything else.

Beyond accounting it connects to RESNET National Registry (Built-in upload of building files, individually or in batch, from Tools > RESNET Building Registry. Provider credentials required; raters can't upload. It returns a Registry ID that releases official (non-watermarked) HERS reports.), XML (REM building schema) (Import of building models from XML, documented with sample .blg, sample .xml and a rem-building.xsd attached to the knowledge base article. Export to XML is a separately purchased, per-address item.), Microsoft Access (The Export Database feature writes modelling inputs and outputs to an MS Access database for statistical analysis, archiving and custom report generation.), Building Interchange File (Export and import of portable building files between REM/Rate releases, added across all three supported versions in mid-2025.), AXIS (Pivotal Energy Solutions) (AXIS, the rating-management platform whose sibling APEX is itself a RESNET accredited rating tool, lists "Rating Software Integration" as a feature on both its RATER and PROVIDER tiers, with the caveat that "Software integrations vary based on rating software". But REM/Rate isn't named on that page.). A public API exists: No public API, no developer portal, no authentication documentation and no rate limits, because there is no web service to call. All programmatic movement is file-based: XML in against a published-but-unvalidated schema, XML out as a paid per-address item, an MS Access database export, and the Building Interchange File. The vendor's own framing of the schema is that it exists "just as a reference for developers wanting to create XML import files", which is an import path, not an API.

What happens when REM/Rate breaks

REM/Rate lock-in, in plain terms

Nobody reads this section before they buy, and it's the one that costs money afterwards. Four terms decide what leaving looks like.

Minimum term. One year, and the year is enforced by an expiration date held on the vendor's server rather than by a contract clause you can read. "REM/Rate™ is available to be licensed annually to RESNET® accredited HERS® Providers." The FAQ makes the mechanic explicit: "Once we have received payment of the Annual License Fee, and a signed Software License Agreement or Amendment (if appropriate), the expiration date will be advanced one year on our web server."

Auto-renewal. No auto-renewal, and that is a burden rather than a mercy. Nothing renews by default; the licence simply expires and the software starts warning, then stops. Reinstating it requires the vendor to receive payment AND a signed Software License Agreement or Amendment, then advance the date on their server, then you re-register the installed copy: "REM/Rate™ can be re-registered by selecting Web Services on the Tools Menu." A rating shop that lets the paperwork slip in the middle of a permit deadline has a dead tool, not a lapsed card.

Early termination. The EULA is asymmetric on refunds. If you breach, you get nothing back: "This Agreement will automatically terminate upon your breach of any of this Agreement's terms and conditions. In the event of termination caused by your breach, no refunds or credits will be due." If the vendor walks away, you do get money back: "Licensor may terminate this Agreement without liability upon ten (10) days written notice to you. In the event of any such termination for convenience, Licensor shall pay you a pro rata refund." If YOU walk away mid-term, the clause is silent on money entirely: "You may terminate this Agreement by removing the Software from your device(s)." There is no stated pro rata refund for voluntary customer termination.

Payment processing. Not applicable. REM/Rate is a desktop calculation engine, not a billing system. It takes no customer payments and there is no processing rate, because the outputs are rating certificates, code-compliance reports and an inputs-and-outputs database, not invoices.

The REM/Rate review corpus, read by complaint

What else you should be pricing beside REM/Rate

So what else is there? Every peer below competes with REM/Rate in real shortlists, not just in a feature grid.

AXIS / APEX (Pivotal Energy Solutions). Being the only tool in this category with a public price page. And it's the workflow layer REM/Rate lacks entirely: inspection workflow, sampling, certification and QA workflow, label and certificate generation, EPA host quarterly reporting, and 24x7 desktop and mobile access. The PROVIDER tier adds $7 per home and a $750 to $1,500 setup fee. But It's a rating-management platform first. Its accredited engine, APEX, is newer and less entrenched than REM/Rate, whose model files and library conventions many Providers and utility programs have been built around for two decades.

Ekotrope RATER. Being web-based, which removes the Windows-only and Parallels problem that REM/Rate reviewers have complained about since 2011. Ekotrope also publishes API and inspection-sync capability, and RESNET lists it at version 5.2 with a long accredited version history. But Also refuses to publish a price, so the pricing opacity is a category problem rather than a REM/Rate problem. And it markets itself against REM/Rate hard enough to publish a support article on diagnosing why the two engines disagree, which tells you a switch means re-validating your results.

EnergyGauge USA (Coded Energy). Deep Florida code lineage, and RESNET accreditation at version 8.2.00 with a long version history behind it, so it's a credible substitute where state-specific compliance matters. But Smallest public footprint of the accredited set. The vendor's own site returned an effectively empty page when probed, so anything you want to know has to come from a sales conversation.

HouseRater. Built as a modern web app with a self-serve registration path at app.houserater.com and a booked-demo funnel, so evaluation doesn't start with an email to a sales inbox. But Newest and smallest of the accredited tools. RESNET lists it at v3.4.1.1 with "Previous Versions: n/a", meaning no accredited version history at all, against REM/Rate's list of more than a dozen.

REM/Rate Lite (same vendor). It's the only edition a non-RESNET user can license, it ships in the same installer as the full product, and it keeps the whole calculation core: loads, consumption, costs, equipment sizing, IECC compliance, Improvement Analysis and the component libraries. But It can't produce the outputs most buyers want it for. No HERS Index, and as of the DOE and EPA binding guidance it can no longer certify ENERGY STAR Single-Family New Homes or DOE Zero Energy Ready Homes: "Both Energy Star and ZERH reports will be either disabled or rendered NO PRINT in REM/Rate™ Lite depending on the version."

Who should not buy REM/Rate

Don't buy REM/Rate if you're A custom home builder of 5 to 50 who wants to bring HERS modelling and ENERGY STAR certification in-house instead of paying a rater per home. You're not eligible to license the product that does that. The full edition is restricted to RESNET accredited HERS Providers, and the edition you can buy, REM/Rate Lite, has had HERS Index, ENERGY STAR Single-Family New Homes and DOE Zero Energy Ready Homes reporting deliberately removed, because DOE and EPA now require a Home Certification Organization to oversee the verifier. So buying Lite and expecting a certificate ends in a disabled or NO PRINT report. Look at A contracted third-party HERS rater working under an accredited Provider instead.

Don't buy REM/Rate if you're A residential HVAC contractor of 3 to 20 trucks looking for a Manual J load calculation tool to size equipment and satisfy a permit office. REM/Rate does size mechanical equipment, but it's an annual-energy rating engine built around HERS, ERI and IECC compliance, sold through RESNET Providers, priced by nobody publicly, and delivered as a Windows desktop install with no mobile client. And a load-calc tool you can open on a tablet at a replacement job is a different product category, and REM/Rate's own reviewers say the interface and report output are the weak part. Look at A dedicated ACCA-approved Manual J tool instead.

Don't buy REM/Rate if you're Any shop whose staff work primarily on Macs or in the field on tablets. There's no Mac build, no web version and no mobile app, and the vendor's answer is a Windows emulator. Practitioners including the tool's own best-known trainer have been buying Parallels to run it since 2011, and the published system requirements still reference Internet Explorer 4.0 for the help file. So every rater seat carries a hidden Windows tax. Look at Ekotrope RATER instead.

Don't buy REM/Rate if you're An energy consultant doing existing-home retrofit work who sells jobs on projected utility savings. The strongest independent validation of REM/Rate covers cooling loads in new ENERGY STAR homes in a hot humid climate. But on older, leaky, poorly insulated housing stock the same analyst says the modelling is poor, one commenter stopped using it for cooling savings projections because it undershot actual savings, and the vendor publishes no accuracy data at all. So building a retrofit pitch on those projections puts your credibility on a number the vendor won't stand behind in public. Look at Billing-history regression against a measured baseline instead.

The verdict, by shop size

HERS rating and residential energy-consulting shops of 1 to 25, already inside a RESNET accredited Provider program

Only under conditions, and they are worth being honest about. This is the only band the product is sold to, and for new-construction ratings it does the job: one hourly engine, three vintages of the 301 standard, IECC 1998 to 2021, ENERGY STAR, ZERH, NGBS and LEED for Homes off a single building file, plus direct RESNET registry upload. The conditions are commercial rather than technical. So get the Provider's printing permission configuration in writing report by report, get the per-address XML export rate in writing, and confirm the annual fee and the renewal paperwork cycle, because none of the three is published and all three can stop you delivering. This band runs 1 to 25 on the crew, doing residential work, and that's the profile the recommendation is written for.

Custom home builders of 5 to 50 wanting in-house HERS modelling and ENERGY STAR certification

No. You're not eligible. The full product is restricted to RESNET accredited HERS Providers, and the edition you can buy has had HERS Index, ENERGY STAR Single-Family New Homes and DOE ZERH reporting removed because DOE and EPA now require an HCO to oversee the verifier. So paying for Lite and expecting a certificate ends with a disabled or NO PRINT report. Contract a rater working under an accredited Provider instead, and spend the software budget on the sales side of the business. This band runs 5 to 50 on the crew, doing residential work, and that's the profile the recommendation is written for.

Residential HVAC contractors of 3 to 20 trucks looking for load calculation and equipment sizing

No. REM/Rate sizes equipment, but that's a by-product of an annual-energy rating engine, not a service-trade load-calc tool. It's Windows desktop only with no mobile client, it's sold through a RESNET Provider you'd have to find and contract with, it has no published price, and its most-cited practitioner complaints are the interface and the report output. So a tech standing in a mechanical room on a changeout needs a tablet tool, not a rating engine. This band runs 3 to 20 on the crew, doing residential and service work, and that's the profile the recommendation is written for.

Energy consultants and weatherization crews of 1 to 15 working existing housing stock

Only under conditions, and they are worth being honest about. The Improvement Analysis, duct leakage and condition analysis, and lighting and appliance audit are genuinely useful here, and REM/Rate Lite is licensable without RESNET accreditation. But the honest caveat is the one the tool's own supporters make: on older, leaky, poorly insulated homes the modelling is weak, one practitioner stopped using it for cooling savings projections because it undershot the real result, and the vendor publishes no accuracy data. So use it to compare measures against each other, not to promise a homeowner a bill number. This band runs 1 to 15 on the crew, doing residential work, and that's the profile the recommendation is written for.

What we checked on REM/Rate, and what we didn't

What this page is, and what it isn't. We read REM/Rate's own pages and its review corpus. We didn't operate it. So here's the basis. We read 15 vendor pages for REM/Rate on 7 August 2026, and we went through the reviews looking for complaints rather than for averages. Prices were checked the same day. Nothing here is carried forward from an older sweep.

So: eight quotes on this page, four from Energy Vanguard blog comments, one from Energy Vanguard blog comments (post author, Energy Vanguard founder and HERS trainer), one from Quoted by Allison Bailes in the Energy Vanguard article body, discussing Blasnik's Houston Home Energy Efficiency Study for Advanced Energy, one from Energy Vanguard blog comments (then editor of Green Building Advisor's Musings of an Energy Nerd) and one from Zero Carbon Home.

And https://www.getapp.com/construction-software/a/rem-rate/ (HTTP 403 to curl with a browser user agent), https://www.g2.com/products/rem-rate/reviews (HTTP 403), https://www.trustradius.com/products/rem-rate/reviews (HTTP 403), https://www.trustpilot.com/review/remrate.com (HTTP 403), https://sourceforge.net/software/product/REM-Rate/ (HTTP 403), https://slashdot.org/software/p/REM-Rate/ (HTTP 403), https://groups.google.com/g/rem-software (HTTP 200 but body reads "Content unavailable"; the REM Software Google Group the vendor points users to requires a signed-in account), https://www.mass.gov/doc/residential-building-energy-modeling-analysis/download (HTTP 403 to both WebFetch and curl; a Massachusetts residential energy modelling analysis that likely discusses REM/Rate directly and couldn't be opened) and http://www.greenbuildingadvisor.com/blogs/dept/musings/energy-modeling-isn-t-very-accurate (Martin Holladay's follow-up on REM/Rate accuracy, cited from the Energy Vanguard comment thread; not opened, so only his summary of it is quoted, from the comment itself) refused automated retrieval for REM/Rate. Where their scores appear in third-party roundups we have left them out rather than pass on a number we could not open.

What that leaves untested: the software itself. REM/Rate is a Windows desktop installer restricted to RESNET accredited HERS Providers, and the 14-day trial deliberately returns sample data rather than accurate results, so even installing it wouldn't have produced a usable functional assessment.. And everything above is 15 vendor pages and a review corpus, which is documentary rather than hands-on.