Income and Tax Calculators
26 calculators in Finance. Each one shows its formula and a worked example, and most list the sources behind them.
Calculators, A to Z
1031 Exchange Deadline Calculator
Count the 45-day identification and 180-day deadlines of a section 1031 exchange, compare your tax-return cutoff and test the 3, 200% and 95% rules.
Additional Medicare Tax Calculator
Calculate the 0.9% Additional Medicare Tax on Form 8959 from Medicare wages, self-employment income, RRTA pay, and employer withholding.
Arkansas Paycheck & Salary Calculator
Arkansas salary calculator: take-home pay from a salary or a paycheck after 2026 state formula or low-income tables, federal tax, Social Security and Medicare.
Bonus Tax Calculator
Find your 2026 or 2025 net bonus after 22% or 37% IRS supplemental withholding, aggregate payroll method, FICA, 401(k), state tax, or gross-up.
California Income Tax Calculator
Calculate 2025 California Form 540 income tax from federal AGI, Schedule CA adjustments, deductions, exemption credits, and the 1% surtax over $1M.
California LLC Tax and Fee Calculator
A California LLC's $800 annual tax and its fee of $900 to $11,790 by total California income, with the 10% estimate penalty and every due date.
California Paycheck & Salary Calculator
California salary calculator: take-home pay from a salary or one paycheck after 2026 or 2027 EDD Method B state tax, SDI at 1.3% or 1.4%, federal tax and FICA.
Capital Gains Tax Calculator
Calculate 2025 to 2027 federal and state capital gains tax across 0%, 15%, and 20% brackets, ordinary short-term rates, 3.8% NIIT, and after-tax proceeds.
Capital Loss Carryover Calculator
Capital loss deduction for the year ($3,000, or $1,500 if married filing separately) and the short-term and long-term loss carried forward, by Pub 550.
Earned Income Tax Credit Calculator
Federal earned income tax credit from earned income, AGI, qualifying children, filing status and investment income, with phase-in and phase-out.
Estimated Tax Underpayment Penalty Calculator
Form 2210 underpayment penalty by installment: required payments, payments applied earliest first, and the IRS quarterly rate for the days each stayed unpaid.
Federal Income Tax Calculator
Calculate 2025 to 2027 Form 1040 federal income tax across all 5 filing statuses, standard or itemized deductions, capital gains, Child Tax Credit, and refund.
Federal Paycheck Withholding Calculator
Calculate 2026 federal income tax withheld per paycheck under IRS Publication 15-T Worksheet 1A across all W-4 steps, pre-tax deductions, and pay frequencies.
Group-Term Life Imputed Income Calculator
Taxable cost of employer-paid group-term life insurance over $50,000 from Pub. 15-B Table 2-2 by age, less what you paid, with the FICA and W-2 code C amount.
Hourly to Salary Calculator
Convert an hourly wage to annual, monthly, biweekly, weekly, and daily pay, or a salary to an hourly rate, from your hours, weeks, and unpaid time.
HSA Contribution Limit Calculator
HSA contribution limit for 2025 to 2027 from your coverage each month, age 55 catch-up, December 1 coverage, employer contributions and room left.
IRS Late Filing and Payment Penalty Calculator
IRS failure-to-file and failure-to-pay penalties and interest on unpaid tax from amount owed, due date, filing and payment dates, with the minimum penalty.
Like-Kind Exchange Calculator
Realized, recognized and deferred gain and the basis of the replacement real property in a section 1031 like-kind exchange, with cash, mortgages and expenses.
MN Property Tax Refund Calculator (M1PR Limit)
Calculate your 2025 Minnesota Homestead Credit Refund (Form M1PR, payable 2026): the $142,490 income limit, 14.88% boost, and $1,000 Special Refund.
Net Investment Income Tax Calculator
Form 8960 net investment income tax: 3.8% of the smaller of net investment income and modified AGI over the threshold, from your investment income.
Net Operating Loss (NOL) Calculator
Federal net operating loss carryforward deduction under the 80% cap and pre-2018 100% offset, plus Form 172, Form 461, Form 1120 and Form 1120-PC NOLs.
Pay Raise Calculator
What a raise adds to each paycheck and to your year after 2026 federal, Social Security, Medicare and state taxes, and whether it keeps up with prices.
Quarterly Estimated Tax Calculator
Calculate your 2025 and 2026 Form 1040-ES quarterly estimated tax payments, Schedule SE tax, 90% and 100%/110% safe harbors, and due dates.
Self-Employment Tax Calculator
Calculate 2025 and 2026 Schedule SE self-employment tax, the 50% deduction, the Social Security wage-base cap with W-2 wages, and Additional Medicare Tax.
Take-Home Pay Calculator
See your per-paycheck and annual take-home pay after 2026 or 2025 federal, FICA, and state taxes, 401(k), health, and HSA deductions.
W-4 Multiple Jobs Worksheet Calculator
Step 4(c) extra withholding per paycheck from the 2026 Form W-4 Step 2(b) Multiple Jobs Worksheet tables, for two or three jobs, from each job's annual wages.
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