Calculators
Miami-Dade Homestead Portability Calculator
This calculator is for Miami-Dade homeowners with a homestead in place who are weighing a move. It estimates how much of your Save Our Homes benefit transfers to the next house and what that saves you each year, using the 2025-26 adopted millage and the 2026 homestead exemption of $51,411.
Run Your Own Portability Math
Enter the just/market value and assessed value from your TRIM notice, plus the price of the home you are considering. The calculator estimates your portability transfer, your annual tax with and without portability, and your ten-year savings using the adopted combined millage for the area you pick and the 2026 homestead exemption of $51,411.
From your TRIM notice or miamidadepa.gov. This is the appraiser's value, not your estimated sale price.
Also from your TRIM notice or miamidadepa.gov
For a new purchase, the appraiser sets just/market value below the sale price for the first tax year, typically near 85% of it
2025-26 adopted combined millage. Full breakdown in the millage guide.
Estimates based on the 2025-26 adopted combined millage for the area you select and the 2026 homestead exemption of $51,411. Rates are reset every September and non-ad valorem assessments are not included. The $500,000 portability cap applies. Always verify with the Miami-Dade Property Appraiser before relying on these numbers for a transaction.
Rates last verified August 2026 against the Miami-Dade Property Appraiser's 2025-26 adopted millage chart.
How this works
The calculator reads the difference between your current home's just/market value and its assessed value as your Save Our Homes benefit. If the new home's value is equal or higher, the whole benefit transfers, up to the $500,000 cap. If you are downsizing, the benefit transfers in proportion to the new home's value, and the portion that does not transfer is permanently lost.
From there it figures the new assessed value, subtracts the 2026 homestead exemption of $51,411, and applies the 2025-26 combined millage for the area you select. The result is your estimated annual tax with and without portability, the yearly savings between them, and what that difference adds up to over ten years.
The tool is free and runs entirely in your browser, so the values off your TRIM notice never leave the page. The pillar guide below walks through the same math by hand, including the three-tax-year window you have to claim portability after a move.
