August 22, 2023—Add "Married Filing Separately" tax status

We added "Married Filing Separately" as an option to the "Tax Filing" input. The current IRA incentives treat this status the same as "Single", but our calculation of tax savings will be more accurate. We also relabeled "Joint" as "Married Filing Jointly".

January 24th, 2023—Update tax rate tables and standard deductions for 2023

The calculator is updated to use 2023 tax rate tables for the various filing statuses (single, joint, and head of household) including the updated standard deductions. More information can be found on the IRS website

January 20th, 2023—Updated rebate program labels

We changed how we refer to the two rebate programs that are part of the Inflation Reduction Act to match how Department of Energy refers to them. Upfront Discounts (HEEHR) are now referred to as Electrification Rebates (HEEHR), Whole Home Energy Reduction is now referred to as the Efficiency Rebates (HOMES) throughout the user interface and API.

December 30th, 2022—Updated average rooftop solar installation costs

We updated the average installation cost of rooftop solar from $19,000 to $15,300 on this page. That means the 30% tax credit will have an average value of $4,600. We calculated this national average from state-level data collected via solarreviews.com and published via Consumer Affairs. Other organizations such as NREL and SEIA publish similar numbers.

November 1st, 2022—Started collecting calculator inputs

We are now collecting the calculator inputs, including zip code and household information. We will only use this data in aggregate and anonymized to help us better understand who is interested in the IRA incentives, and help us build lists of qualified contractors for certain zip codes.

September 13th, 2022—Added EV Charger tax credit

We added the EV Charger tax credit to the list of possible incentives. Since we only ask for your zip code and not your full address, we can only make a best guess. Zip code is not specific enough to give a firm answer. The eligibility formula is based on census tract. Many zip codes contain many census tracts. Those census tracts can vary greatly in terms of median family income (MFI) and poverty rate.

We took a conservative approach given we don't have your exact address. We grab the census tract in your zip code with the lowest poverty rate and the census tract with the highest MFI when determining eligibility. This should reduce the false positives to zero, but will lead to some false negatives where you do qualify but we say you do not.

September 13th—Improved ZIPS to FIPS mapping

We improved our ZIPS to FIPS mapping by upgrading our database from a general mapping solution to using the HUD USPS Zip Crosswalk data, which has more specific FIPs matches for a given zip code. We match using 'cbsasub' values instead of FIPS prefixes now.

August 23rd, 2022 — Fixed max income limit for previously-owned EV tax credit

Max income for joint tax filing was set to $112,500, when it is actually $150,000. Max income for head of household tax filing was set to $150,000, when it is actually $112,500.

August 22nd, 2022 — Removed the community solar credit

The 25D tax credit can be applied to the "ownership model" of community solar, in which a consumer partially owns their community solar installation. However, this model is relatively less common than the "subscription model" of community solar, which is not eligible for the 25D tax credit. All community solar installations (no matter the model) are eligible for the supply-side 48C investment tax credit that was extended and increased to 30% in the Inflation Reduction Act.

August 18th, 2022 — Corrected start date for battery storage installation credit

Battery storage installation credit was mistakenly labeled as available now. It is not available until January 1st, 2023.

August 17th, 2022 — Added heat pump water heater tax credit

We added differentiated entries under the 25C tax credit for heat pumps for space heating and for water heating.