By concept
Calculators by topic
Some questions cross jurisdictions. These pages collect every calculator that touches the same legal or financial concept, no matter which state it lives in.
Cross-state
Homestead Exemption Calculators
Every state's homestead-exemption math. Florida, Texas, California, and the 30+ other jurisdictions that carve out a primary-residence value reduction from the property-tax base — plus the federal § 121 primary-residence capital-gains exclusion that handles the *sale* side.
6 calculators
Cross-state
Property Tax Calculators
Every state with a property-tax calc on The Fennec Lab. We model assessment ratios, exemptions, millage, caps, freezes, and circuit-breaker refunds for each state we cover — anchored to the actual statute.
36 calculators
Cross-state
Real Estate Transfer Tax Calculators
Doc stamps, conveyance, recordation, mansion tax — every flavor of state and county transfer tax that lands on a settlement statement. We've built calculators for every state that imposes one.
10 calculators
Cross-state + federal
Inheritance & Estate Tax Calculators
The six US jurisdictions that levy an inheritance tax (PA, NJ, KY, MD, IA, NE), the federal estate-tax exemption + portability, and the state-level mechanics that surface around closing an estate.
11 calculators
Federal + state
Capital Gains Tax Calculators
Federal mechanics — § 121 primary-residence exclusion, § 1031 like-kind exchange, § 1031(f) related-party rule, § 1411 NIIT, § 1202 QSBS — plus Washington State's standalone 7% long-term capital gains tax.
6 calculators
Federal
1031 Exchange Calculators
Like-kind exchange math under IRC § 1031 — the general rule, related-party two-year hold under § 1031(f), and the partner-level adjustments that follow.
3 calculators
Federal + methodology
Retirement Planning Calculators
Withdrawal-rate sustainability (Bengen + Trinity), required minimum distributions, backdoor Roth conversions, Solo 401(k) limits, FBAR penalties, and the cross-state tax mechanics retirees actually face.
7 calculators
Federal + financing
Small Business & Acquisition Calculators
SBA 7(a) loan payment + DSCR underwriting, business valuation under Rev. Rul. 59-60, IRC § 338(h)(10) asset-vs-stock comparison, § 754 partnership step-up, § 280E cannabis disallowance, § 469 passive-activity loss, and the federal-tax mechanics small-business owners actually face.
11 calculators
Cross-state
Senior Property Tax Relief Calculators
Senior-targeted property-tax relief programs from the states we cover: valuation freezes, circuit-breaker refunds, percentage exemptions, and the income-tested abatements that meaningfully reduce post-65 housing cost.
0 calculators