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Tax & Deductions Calculators

US federal tax planning, equity compensation, and multi-country tax tools.

After-Tax Income Calculator

Drop gross income, filing status, state, and any 401(k)/HSA pre-tax contributions — get federal + state + FICA + Medicare stacked into one annual after-tax number, with monthly + bi-weekly + weekly breakdowns. Pre-tax deductions surfaced as a separate line so you can see the lever.

Backdoor Roth + Pro-Rata Trap Calculator

Compute pro-rata tax bill if Trad IRA pre-tax balances trigger aggregation. Mitigation: roll pre-tax to 401(k) first.

Bonus Tax Calculator

Enter your salary + bonus + state. The calculator shows the supplemental flat withholding (22% federal) versus your real marginal tax — and tells you whether you'll get money back at filing or owe more.

Capital Gains Tax Calculator

Drop cost basis, sale price, holding period, AGI, filing status, and optional state rate — get federal capital-gains tax (short-term at ordinary brackets, long-term at 0/15/20%), NIIT 3.8% if applicable, and the held-vs-sold counterfactual showing what you'd save if you held to 12 months.

Dependent Care FSA vs Child Tax Credit Calculator

Optimal DCFSA contribution + residual claimed via CDCC (Form 2441). Total tax saved this year vs CDCC alone.

Digital Nomad Tax Residency Optimizer

Compare US-stay vs FEIE (Form 2555) vs FTC route across 12+ nomad destinations. Bona Fide vs Physical Presence eligibility, state shedding, treaty offsets, self-employment tax — surfaces best route + savings vs baseline.

HSA Triple-Tax Optimizer

Project HSA growth at retirement vs Trad 401(k), Roth 401(k), and taxable. Optimal shoebox-method receipt-storage timeline.

529 vs UTMA vs Roth (Kids) Calculator

Vehicle-by-vehicle growth + tax + FAFSA financial-aid impact. State 529 deduction lookup. SECURE 2.0 unused-529-to-Roth provision.

Mega-Backdoor Roth Calculator

Check eligibility (after-tax + in-plan/in-service), compute this year's after-tax headroom, and project lifetime Roth growth vs taxable.

Multi-State Remote Work Tax Exposure

Domicile state + every state you worked from — total tax owed, double-taxation exposure, NY/CT/DE/NE/PA convenience-rule penalty, recommended record-keeping.

Property Tax Calculator

Drop home value + state — get your effective property-tax rate (US Census 2022 medians), annual bill, monthly escrow, and how it compares to the national and state averages. Optional county-rate override for hyperlocal accuracy.

Quarterly Estimated Tax Calculator

Plug in your projected income, withholding, and last year's numbers. The calculator applies the IRS safe harbor and tells you exactly what to send by April 15 — and the same amount each following quarter.
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