2025 millage rate, Save Our Homes reset trap, exemptions, and the DeSantis November 2026 ballot measure — every number that matters before you buy.
St. Johns County's 2025 total millage rate is approximately 13.47 mills. One mill equals $1 per $1,000 of taxable value. Your property tax bill is calculated as:
(Market Value − Exemptions) × 0.01347 = Annual Tax Bill
The millage is composed of multiple taxing authorities — county, school district, water management, and any special districts — all consolidated into your single property tax bill. The 13.47 mills figure reflects the combined 2025 rate; it can change annually when local budgets are set each fall.
| Purchase Price | After $50K Exemption | Year-1 Annual Tax | Monthly |
|---|---|---|---|
| $300,000 | $250,000 | $3,368 | $281 |
| $350,000 | $300,000 | $4,041 | $337 |
| $400,000 | $350,000 | $4,715 | $393 |
| $425,000 | $375,000 | $5,051 | $421 |
| $450,000 | $400,000 | $5,388 | $449 |
| $500,000 | $450,000 | $6,062 | $505 |
| $600,000 | $550,000 | $7,409 | $617 |
These figures assume the standard $50,000 homestead exemption and do not include CDD assessments. Add your community's CDD to get the full annual tax-bill total.
Florida's Save Our Homes (SOH) Amendment, passed in 1992, limits the annual increase in a homesteaded property's assessed value to 3% or the rate of inflation, whichever is lower. This means a homeowner who bought 15 years ago at $200,000 and has seen their home appreciate to $450,000 is still being taxed on an assessed value far below $450,000 — sometimes $250,000 or less.
When they sell to you, that protection disappears. Florida law requires a full reassessment to market value in the year following a sale. Your assessed value resets to what you paid, and your tax bill is calculated on that number.
Available to any Florida resident using the property as their primary residence. File with the St. Johns County Property Appraiser by March 1 of the year you want the exemption to apply. Reduces your taxable value by $50,000. This is the exemption already applied in all calculations on this page.
St. Johns County offers an additional homestead exemption of up to $50,000 for homeowners who are 65 or older, have lived in the home as their primary residence for at least 25 years, and whose household income does not exceed the state limit (approximately $36,614 in recent years — verify current threshold with the property appraiser). This exemption is income-limited and will not apply to most active-adult community buyers, but it is worth confirming if your income is near the threshold.
A $500 reduction in assessed value for widows or widowers. Minor but confirmable at the property appraiser's office.
Various exemptions for total and permanent disability, service-connected veteran disability, and combat disability for veterans 65+. Amounts vary from $500 to full exemption for qualifying 100% disabled veterans. Contact the St. Johns County Property Appraiser directly to confirm eligibility.
| Purchase Price | Tax Under Current $50K Exemption | Tax Under Proposed $250K Exemption | Annual Savings If It Passes |
|---|---|---|---|
| $350,000 | $4,041 | ~$1,347 | ~$2,694 |
| $425,000 | $5,051 | ~$2,357 | ~$2,694 |
| $500,000 | $6,062 | ~$3,368 | ~$2,694 |
| $600,000 | $7,409 | ~$4,715 | ~$2,694 |
The savings are consistent at approximately $2,694/year regardless of price point — because the additional $200,000 exemption is fixed and the millage applies equally. School taxes reduce the actual savings below this estimate; exact figures depend on which school district levies apply to your parcel. Full DeSantis exemption breakdown →
Community Development District assessments appear as a separate line item on your St. Johns County property tax bill. They are not part of the millage calculation — they are added after. At Parkland Preserve, that adds $2,390–$3,924/year to the figures in the table above. At Reverie at Silverleaf, it adds $0. At WaterSong, verify the parcel. Full CDD guide →
Before making an offer on any St. Johns County property, pull the current parcel at sjcpa.us and calculate your year-1 tax bill — not the seller's bill. An agent who understands the SOH reset can walk you through the actual numbers for any home you are considering.
Connect with a Local Agent →Millage rate of 13.47 mills reflects St. Johns County FY2025-26 adopted budget. Exemption amounts and eligibility requirements verified against St. Johns County Property Appraiser office. DeSantis $250K exemption status as of June 2026: passed Legislature, goes to November 2026 voter ballot. All calculations are estimates — actual bills vary by parcel, city limits, and special district. This page is for research purposes only.