Finance Calculators

Estimate US federal income tax

2026 SE tax, deductible half, and quarterly estimates

Compare 2026 contractor vs employee take-home pay

2026 tax on a Roth conversion, fill-the-bracket

2026 Required Minimum Distribution for IRAs and 401(k)s

2026 underpayment penalty and safe harbor check

2026 supplemental wage tax: flat rate vs aggregate, FICA, and state withholding

2026 W-4 withholding estimator — see if you will owe or get a refund and adjust your W-4

Estimate tax & withholding gap on RSU vesting — federal, state, FICA

Estimate taxes on ESPP shares — compare qualifying vs disqualifying dispositions with lookback

2026 Medicare Part B & Part D income surcharge by MAGI tier

Find your 2026 HSA limit — proration, catch-up, employer offset & tax savings

How much of your SS benefits are taxable? Provisional income formula with 0/50/85% tiers

2026 pro-rata rule calculator for high earners — see tax cost before converting

3.8% net investment income surtax — does it apply to you and how much?

Qualified charitable distribution: AGI exclusion, RMD satisfaction, and IRMAA impact for IRA owners 70½+

2026 OBBBA: $40,400 cap — see if you should itemize and your tax saving vs. old $10,000 limit

Section 199A 20% pass-through deduction — SSTB check, phase-out, W-2 wage limit, OBBBA $400 minimum

Calculate your 2026 Modified Adjusted Gross Income and instantly check all 8 key thresholds: Roth, IRMAA, NIIT, SS, HSA, QBI, SALT, ACA

OBBBA 2026: deduct up to $10,000 of auto loan interest on US-assembled new vehicles — calculate deduction, phase-out & tax saving

Compare simplified ($6/sq ft) vs regular method (actual expenses) — find which gives you the larger 2026 Schedule C deduction

Compare lifetime tax with and without a Section 83(b) election on restricted stock — see savings and break-even price

FIRE early retirement: plan your annual conversions, track the 5-year rule unlock for each batch, and calculate the bridge funding gap in years 1–5

Compare the standard deduction against your itemized deductions — SALT, mortgage interest, charity, medical — and see which saves more under 2026 OBBBA rules

Estimate AMT when exercising Incentive Stock Options — find your AMT crossover point and plan optimal exercise strategy for 2026

2026 CTC under OBBBA: $2,200 per child, $1,700 refundable ACTC, income phase-out, and Other Dependent Credit

Estimate your 2026 federal and state tax refund or balance due — supports all 50 states with state-specific brackets

2026 Earned Income Tax Credit: phase-in rate, max credit, and phase-out by filing status and qualifying children

2026 FICA and self-employment tax: Social Security, Medicare, Additional Medicare, and SE tax with deduction