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Mortgage Calculator Georgia
Georgia just rewrote its property tax rules — but whether the new inflation cap actually protects you depends entirely on which county you're buying in. This calculator explains the 2025-2026 patchwork before it gives you a number.
Estimate your Georgia mortgage payment
Updates liveIllustrative estimate only. Whether your future tax increases are inflation-capped depends on your specific county — see below. Not a loan offer or financial advice.
Diagram: as of 2026, whether your home's taxable value is capped at inflation really depends on your county — that changes statewide from 2027.
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Understanding the Georgia mortgage market
What makes a Georgia mortgage different right now
Georgia just went through the biggest property tax overhaul in a generation — and depending on exactly where you're buying, it either already protects you or doesn't, at least for one more year. This mortgage calculator Georgia buyers use is built around that split.
House Bill 581, explained properly
Georgia voters approved House Bill 581, the "Save the Homes Act," in a November 2024 referendum, and it took effect for the 2025 tax year. At its core, it creates a statewide floating homestead exemption that caps how much a primary residence's taxable assessed value can rise each year to the rate of inflation (based on the Consumer Price Index) — not the full amount the market value might have actually gone up by.
This isn't a value freeze. Your home's taxable value can still rise every year — just capped at inflation rather than tracking a hot local market, which in fast-appreciating parts of Georgia can be a meaningfully smaller number.
The county opt-out patchwork
Here's the detail that makes Georgia truly different from a simple statewide rule: local governments and school districts were allowed to opt out of HB 581 by March 1, 2025, according to the Georgia Department of Revenue. A significant number did, including most of the largest metro Atlanta counties and their school districts — Fulton, Gwinnett, Cobb, DeKalb and Chatham among them. In those jurisdictions, homestead taxable value can still rise with the full market through the 2026 tax year, without the inflation cap applying.
This means the honest answer to "does my Georgia property tax growth get capped" really depends on your specific county and school district — not a single statewide yes or no. This mortgage calculator Georgia buyers use flags that upfront instead of pretending one flat rule applies everywhere.
| Status | What it means | Example counties |
|---|---|---|
| Opted in to HB 581 | Taxable value growth capped at inflation | Mostly smaller/rural counties |
| Opted out | Taxable value can rise with full market value through 2026 | Fulton, Gwinnett, Cobb, DeKalb, Chatham |
| All counties, from 2027 | Cap becomes mandatory statewide under SB 33 | No exceptions once in effect |
SB 33: the cap becomes mandatory in 2027
Senate Bill 33, the HOME Act, was signed into law in May 2026 and eliminates the local opt-out option going forward, making the inflation-based homestead cap mandatory statewide starting with the 2027 tax year. In practical terms, this means the opt-out counties currently seeing full market-value growth on homestead assessments have a defined end date for that — the patchwork closes, and every homesteaded property in Georgia will eventually be covered by the same inflation cap rule.
The base year, and what resets it
For most existing homeowners, the base year value under HB 581 is the 2024 assessed value. Going forward, the taxable value can only rise from that base by the prior year's inflation rate, unless there's a significant property change like a major renovation. Crucially, this base year value resets to current market value whenever a homesteaded property is sold or transferred to a new owner — a new buyer starts fresh at the purchase price, the same general logic behind California's Proposition 13.
Why Georgia assesses at 40% of value
Georgia taxes real property based on 40% of its fair market value, not the full appraised amount. Local millage rates are then applied to that 40% assessed figure. This assessment ratio has been part of Georgia's system for a long time and is separate from the newer HB 581 growth cap — the 40% ratio determines what portion of value gets taxed in a given year; HB 581 determines how fast that taxable portion is allowed to climb afterward.
Senior, veteran and other exemptions
Beyond HB 581, Georgia offers a base state homestead exemption (increased to $4,000 as part of the same legislative package), plus additional exemptions for homeowners aged 65 and over, disabled homeowners and veterans, which many counties layer with generous local senior exemptions that can cover most or all of the school-tax portion of a bill for qualifying homeowners. These require an application through the county tax assessor's office and aren't automatic.
A worked example, start to finish. Say a buyer purchases a $330,000 home in a Georgia county that opted into HB 581, with an effective property tax rate of 0.9%. With a 10% down payment, they're financing $297,000 at 6.6% over 30 years, giving a principal and interest payment of about $1,898.
Property tax in year one comes to roughly $248 a month based on the $330,000 purchase price. In year two, if area home values jumped 8% but inflation ran at 3%, this buyer's taxable value — now protected by HB 581 as their new base year — would only be allowed to rise by that 3%, not the full 8% the market saw. A neighbor in an opted-out county with an identical home and identical value jump would see their full 8% flow through to their tax bill instead.
Add a typical Georgia insurance premium, and this buyer's total monthly payment comes to about $2,304 in year one — with a materially more predictable trajectory going forward than a comparable buyer in an opt-out county would have, at least until the 2027 statewide mandate closes that gap.
How to use this mortgage calculator Georgia tool
Enter the home price and down payment you're working with, along with your expected interest rate and loan term. The property tax rate defaults to a typical statewide figure of 0.9% — adjust it if you know your specific county's actual combined millage rate. Add an estimated annual insurance premium, and this mortgage calculator Georgia shows your full estimated monthly payment. Remember that this calculator estimates your starting tax bill; whether future increases are inflation-capped depends on your specific county's HB 581 status, discussed above.
Common mistakes to avoid
- Assuming HB 581's cap applies everywhere already. Several major metro counties opted out through at least 2026.
- Not checking your specific county's current opt-out status. This directly affects how predictable future increases will be.
- Confusing the 40% assessment ratio with the HB 581 growth cap. They're two separate, unrelated mechanisms.
- Forgetting the base year resets on sale. A home's protected value doesn't transfer to a new buyer — they start fresh.
- Not applying for available exemptions. Senior, veteran and disability exemptions require an application and aren't automatic.
Quick glossary
- House Bill 581 (Save the Homes Act)
- Georgia's 2025 law creating a statewide floating homestead exemption capping taxable value growth at inflation.
- Floating homestead exemption
- An exemption that automatically grows to absorb value increases above the inflation cap, keeping taxable value growth limited.
- Senate Bill 33 (HOME Act)
- 2026 legislation making the HB 581 inflation cap mandatory statewide from 2027, eliminating local opt-outs.
- Base year value
- The starting assessed value HB 581's cap is measured from, generally the 2024 value for existing homeowners, resetting on sale.
- 40% assessment ratio
- Georgia's rule taxing real property based on 40% of its fair market value.
The bottom line
Georgia is truly mid-transition on property tax right now — a real inflation cap exists, but as of 2026 it doesn't cover every county, especially not several of the largest metro Atlanta jurisdictions. Confirm your specific county's HB 581 status before assuming your future increases are capped, and know that a statewide mandate is coming in 2027 regardless. This mortgage calculator Georgia gives a realistic starting point for today's bill; the county-specific research is what tells you how predictable next year's will be.
Common questions