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Tax Calculators — Free Calculators That Show Their Work

This page is for freelancers, contractors, gig workers, and anyone juggling 1099 income without payroll withholding. Use these tools to estimate self-employment tax, quarterly payments, deductions, and safe-harbor targets with the formulas visible at every step.

50 live calculatorsTransparent formulas
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Effective Tax Rate Calculator

Your marginal bracket isn't what you actually pay. See your combined effective rate across federal, SE/FICA, and state — for W-2 or 1099 income. Bracket breakdown, take-home pay, and income scenario table.

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Federal Income Tax Estimator

Estimate your 2024 federal income tax, effective rate, and refund or amount owed. Includes bracket breakdown, itemized deductions, and withholding analysis.

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Home Office Deduction Calculator

Calculate your home office tax deduction using the IRS simplified method ($5/sq ft, max $1,500) or the regular method (actual expenses × business-use %). See your estimated tax savings for freelancers and 1099 contractors.

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Self-Employed Retirement Account Calculator

Side-by-side comparison of SEP-IRA, Solo 401(k), SIMPLE IRA, and Traditional IRA for 1099 workers. Enter your net SE income to see max contribution, immediate tax savings, projected balance at retirement, and monthly income at 4% withdrawal — for all four accounts simultaneously.

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Business Meal Deduction Calculator

Calculate your 2024 business meal deduction under TCJA 2017 rules. 50% for documented client/team meals, 100% for on-premises employer meals, 50% for office snacks. Covers the entertainment-vs-meal distinction, IRC §274(d) documentation requirements, and your quarterly tax savings.

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Home Office Deduction Calculator

Compare IRS Simplified ($5/sq ft, max $1,500) vs Regular/Form 8829 side by side. Enter rent or mortgage expenses, see both deductions, the winner, tax savings at your rate, and quarterly payment reduction.

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1099-K Reporting Threshold Calculator

Find out if PayPal, Venmo, Stripe, Etsy, or Square will send you a 1099-K. Enter income per platform, see which cross the IRS threshold ($5,000 in 2024, $2,500 in 2025, $600 in 2026+), and get your SE tax estimate regardless of the form.

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1099-NEC vs 1099-MISC: Which Form Do You Get?

Determine whether your payment triggers a 1099-NEC or 1099-MISC — and what to do with it. Covers freelance income, rent, royalties, prizes, attorney fees, and more. SE tax impact included.

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Freelance Invoice Tax Estimator

Enter your invoice amount, expenses, filing status, and state — see your SE tax, federal income tax, state tax, net take-home, and what to set aside quarterly. True after-tax $/hr included.

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W-2 vs 1099 Calculator

Same gross pay, wildly different take-home. See exactly how W-2 and 1099 offers compare after self-employment tax, FICA, and employer benefits — then get the break-even number that tells you exactly what to negotiate.

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Formula

breakEven = 1099 gross that matches W-2 total value incl. benefits

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W-4 Withholding Optimizer

Have a W-2 job and 1099 side income? Find out exactly how much to add on W-4 line 4c to cover your 1099 tax without paying quarterly estimates. Shows total liability, withholding gap, safe harbor status, and recommended amount per paycheck.

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Mileage Deduction Calculator

2024 IRS mileage rates: $0.67/mi business, $0.21/mi medical, $0.14/mi charity. Split your miles by purpose, compare standard rate vs actual expenses (gas, insurance, depreciation, maintenance), and see your tax savings and quarterly payment reduction.

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Tax Debt Payoff Calculator

Calculate how long it takes to pay off IRS tax debt with interest and failure-to-pay penalties. See the true cost, compare extra payment scenarios, model a one-time lump sum, and learn about IRS Fresh Start program options.

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Freelance State Income Tax Overview 2024

2024 income tax rates for all 50 states and DC, ranked by freelancer-friendliness. Filter no-income-tax states, sort by rate, and read contractor-specific notes for every jurisdiction.

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Tax Bracket Visualizer 2024

Visual, educational tool showing exactly how 2024 federal tax brackets work. Stacked bar chart for each bracket, effective vs marginal rate, pre-tax deductions, and the bracket bump myth — busted with the math shown.

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Formula

tax = Σ(dollars_in_each_bracket × bracket_rate)

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SE Health Insurance Deduction

Calculate your Form 1040 Line 17 health insurance deduction as a self-employed person. Covers health, dental, vision, and LTC premiums. Shows deduction cap at net SE income, federal and state tax savings, and effective monthly premium cost after the government subsidy.

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Self-Employed Health Insurance Deduction

Calculate your IRC §162(l) health insurance deduction: medical, dental, vision, and long-term care premiums. Includes income cap logic, marketplace subsidy interaction, and combined AGI reduction with the ½ SE tax deduction.

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Quarterly Tax Safe Harbor Calculator

Calculate the exact quarterly estimated tax payment to avoid the IRS underpayment penalty. Computes both safe harbor methods — 100%/110% of prior year tax vs 90% of current year — recommends the lower one, and shows your per-quarter payment schedule.

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Self-Employment Tax Calculator

Calculate your exact self-employment tax using the IRS formula. Shows SE tax (SS + Medicare), the half-SE deduction, 2024 federal income tax brackets, effective rate, take-home pay, and quarterly estimated payment.

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Multi-State Tax Estimator

Remote freelancer with clients in multiple states? Calculate state taxes owed in each state, credits that prevent double taxation, and your true multi-state tax burden. Covers all 50 states + DC.

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1099 Quarterly Tax

Calculate your estimated quarterly tax payments as a freelancer or 1099 contractor. Covers self-employment tax, federal income tax by bracket, state tax, and IRS safe harbor rules.

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1099 Quarterly Tax Planner

Calculate your quarterly IRS payments with QBI deduction (Section 199A), safe harbor, and all 4 due dates. Adds the 20% pass-through deduction that most freelancers forget to claim.

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Self-Employed Health Insurance Deduction Calculator

Calculate your IRC §162(l) health insurance deduction. See federal + state tax savings, effective monthly premium after tax benefit, net SE income limit check, and ACA Premium Tax Credit eligibility flag.

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Crypto Income Tax Calculator

Calculate SE tax on crypto received as payment and capital gains tax on crypto sales. LTCG/STCG rates, every IRS formula shown.

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Digital Services Sales Tax by State

Look up whether your digital service — SaaS, online courses, digital downloads, consulting, or design — is taxable in all 50 states + DC. Includes post-Wayfair economic nexus thresholds and estimated tax exposure.

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1099 Worker Tax Season Checklist

Interactive tax season checklist for freelancers and 1099 workers. Income documents (1099-NEC, 1099-K), deductible expenses, estimated tax payments, required forms (Schedule C, SE, 8829), and W-9/contractor records. Check off items, track progress %, copy as text.

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Year-End Tax Checklist

Interactive year-end tax checklist for self-employed workers and freelancers. Organized by deadline: Dec 31 action window (Solo 401k, §179 assets, mileage log), Jan 31 (1099-NEC, bank reconciliation), and April 15 (SEP-IRA, Schedule C, QBI deduction). Three-state items: checked / N/A / unchecked. localStorage persistence. Tax savings calculator for retirement, health insurance, and home office deductions.

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Freelancer Annual Tax Summary

The flagship freelance tax overview. Enter your full year of 1099 income, expense categories (home office, mileage, software, equipment, meals, other), retirement contributions, health insurance, state, and filing status to see the complete tax waterfall: net SE income, SE tax, AGI, federal income tax with bracket breakdown, state income tax, total liability, quarterly payments, safe harbor, and net take-home.

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HBTax: Reseller Tax Estimator

Multi-platform reseller tax calculator. Enter income per platform (eBay, Etsy, Poshmark, other), COGS, fees, filing status, and state — get taxable profit, SE tax, federal + state estimate, quarterly payment, and the set-aside percentage to save per sale.

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HBTax: Reseller State Sales Tax Guide

eBay, Etsy, Poshmark, and Amazon handle sales tax for you in most states. See which platforms are marketplace facilitators, your economic nexus exposure by state, and whether you need to register anywhere.

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1099 Tax Withholding Calculator

Calculate exactly what percentage to set aside from every 1099 payment. Covers SE tax, federal income tax by bracket, and all 50 states. Per-invoice set-aside + quarterly payment schedule with 2025 due dates.

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LLC Tax Savings Calculator

Compare Sole Proprietorship, Single-Member LLC, and S-Corp election side by side. See exactly how much SE tax you save with an S-Corp, when the break-even is, and whether to elect now.

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Gig Economy Tax Calculator

Calculate your 2024 gig platform taxes for Uber, Lyft, DoorDash, Instacart, Upwork, Fiverr, or TaskRabbit. Net profit, SE tax, quarterly estimated payments, mileage deduction, and 1099-K threshold — all in one place.

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Quarterly Tax Planner — Full Year View

Plan all 4 quarters of estimated self-employment tax payments at once. Enter income and expenses per quarter, get cumulative YTD tax liability, safe harbor minimums, underpayment penalty risk, and the recommended payment for each quarter. Supports all 50 states.

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What Will My First Paycheck Actually Be?

Student tool for ages 16-21. Enter hourly wage and hours per week to see exactly where every dollar goes. Shows gross pay → federal income tax (2024 standard withholding) → Social Security (6.2%) → Medicare (1.45%) → state income tax → net take-home. Friendly explanations for each deduction. W-2 vs 1099 contractor comparison showing why contractors pay more. ShowMath walks through every step.

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Freelancer Tax Deadline Calendar 2025-2026

Month-by-month tax deadline reference for self-employed workers. Covers Jan 2025 through Dec 2026: Q1-Q4 estimated taxes, 1099-NEC deadlines, S-Corp/Partnership returns, individual return deadlines (original + extension), SEP-IRA and Solo 401k contribution deadlines, and year-end deduction purchase cutoffs. Filter by entity type. Add any deadline to Google Calendar in one click. Countdown to next deadline.

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Writer & Journalist Tax Deduction Finder

Find every tax deduction available to freelance writers, authors, and journalists. Schedule C vs Schedule E royalty determination, home office (Form 8829), equipment (Section 179), research expenses, professional memberships, and SE tax with take-home calculator.

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Real Estate Agent Tax Calculator

Calculate real estate agent taxes after broker split. Standard mileage vs actual vehicle expenses comparison, MLS fees, E&O insurance, desk fees, association dues, signage, photography, open house expenses, marketing, CRM software, home office deduction, and full SE tax breakdown.

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Teacher & Educator Expense Deduction Calculator

Calculate the K-12 educator expense deduction: $300 per eligible teacher, up to $600 married filing jointly. Eligible classroom expense checklist, estimated federal + state tax savings, and SE tax calculation for tutoring and curriculum development side income.

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Musician & Artist Tax Calculator

Calculate taxes for musicians, artists, and performers. Covers performance fees, royalties, lesson income, and merch revenue. Includes SE tax, federal income tax, quarterly estimated payments, and IRC §183 hobby loss risk flag.

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Side Hustle Tax Calculator

Calculate the exact additional tax on side hustle income when you also have a W-2 job. Side income stacks on top of your salary and is taxed at your marginal rate — plus 15.3% self-employment tax. Shows SE tax, additional federal tax, state tax, effective rate, and quarterly estimate.

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Income Tax Brackets Visualizer

See exactly how the 2024 federal tax brackets work. Enter your income and filing status to see how much falls in each bracket, total tax, effective (average) rate vs marginal rate, and why a raise never makes you poorer. Stacked bar chart + bracket table.

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Charitable Giving Tax Deduction Calculator

Cash donations, appreciated stock, DAF bunching strategy — see your true after-tax cost of giving and whether itemizing beats the standard deduction.

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W-4 Tax Withholding Optimizer

Stop giving the IRS an interest-free loan. Enter your income, deductions, credits, and current withholding to see if you're over- or under-withholding, and get exact W-4 Step 3 and Step 4(c) adjustments to land within $500 of $0 owed at filing.

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Crypto Portfolio Tax Calculator

Calculate tax on your full crypto portfolio. Short-term vs long-term capital gains, staking income (Rev. Rul. 2023-14), mining SE tax, and loss harvesting opportunities. Key highlight: crypto is NOT subject to the wash sale rule.

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HSA Tax Triple Benefit Calculator

HSAs are the most tax-advantaged account most people never maximize. See immediate tax savings (contributions reduce AGI + save FICA), projected tax-free growth, the Stealth IRA strategy, and your total tax benefit vs a taxable account over your career.

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Tax Loss Harvesting Calculator

Turn investment losses into tax savings. See IRS netting rules applied (STCL vs STCG first, then LTCL vs LTCG, then cross-netting), total tax saved, ordinary income deduction up to $3,000 (IRC §1211), carry-forward loss, and whether harvesting is worth the transaction costs.

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Tax Extension Calculator

Filed Form 4868? An extension delays your filing deadline — not your payment. Calculate your April 15 balance due, 0.5%/month failure-to-pay penalty, daily IRS interest, and total cost of waiting until October 15.

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1099 vs W-2 Equivalence Calculator

Convert between 1099 contractor rates and W-2 salaries. See the SE tax gap, employer payroll tax, health insurance, retirement match, and PTO value — and the exact premium a contractor must charge to break even.

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Gig Income Tax Burden Calculator

Calculate the full tax picture on gig / 1099 income: SE tax, federal brackets, state tax, mileage deduction, home office, and quarterly estimated payments — all in one tool.

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