TIF Abatement Stack Calculator

TIF and tax abatement often combined for major development.

Pre-development taxes

Post-development taxes

Abatement %

TIF diversion %

Years

Total subsidy

$46,500,000

Annual benefit

$3,100,000

Tax increment

$3,250,000

How the math works

Abatement = post × %. TIF = remaining increment × diversion. Annual = abatement + TIF.

$3.5M × 50% = $1.75M abatement + ($3.5M − $1.75M − $250k) × 90% = $1.35M TIF = $3.1M/yr × 15 = $46.5M.

How to Use

Enter pre-development taxes.
Enter post-development taxes.
Enter abatement %.
Enter TIF % diverted to project.
Enter years of abatement.
Read project subsidy value.

Frequently Asked Questions

TIF mechanics?

Base tax level (pre-development): goes to general taxing authority. Tax increment (post-development increase): diverted to pay project costs for 15-30 years. Covers infrastructure, land assembly, sometimes construction costs.

Abatement mechanics?

Partial or complete tax relief for specified years (5-20). Graduated phase-in common (0% for 5 years, then 25%, 50%, 75%, 100%). Often combined with TIF to bridge feasibility gap.

Combined benefit?

Example: $10M annual new tax. Abatement eliminates 50% = $5M relief. TIF diverts 90% of $5M balance = $4.5M to project. Net to general fund: $500k on $10M increment. Major subsidy for catalytic project.

How often should I rerun this?

Rerun this calculator whenever inputs change materially — new rent roll data, rate moves, loan balance updates, or quarterly operating data. For active deals, monthly refresh is typical. For stabilized assets under monitoring, quarterly is fine. Treat the output as a decision tool, not a one-time answer — market conditions evolve and so should your analysis.