Why is self-employment tax so high?

Because you're paying BOTH halves of FICA: employer (7.65%) + employee (7.65%) = 15.3% on net earnings up to the Social Security wage base. W2 workers only see 7.65% on their paycheck — but their employer is also paying 7.65% on their behalf, that money never appears on the W2. So total FICA is the same; freelancers just feel all of it directly. Half of SE tax is deductible on income tax, partially offsetting the burden.

Should I save 25% or 30% or 35%?

Depends on your state and income level. For TX/FL/etc. (no state income tax) at moderate income: 25% covers federal + SE comfortably. CA at higher income: 35-40% needed. The calculator gives a precise number — better than a rule of thumb. Err on the higher side; over-reserving means a tax-time refund, under-reserving means scrambling to pay.

What's the quarterly estimated tax deadline?

April 15 (covers Jan-Mar income), June 15 (April-May income), September 15 (June-Aug income), January 15 of the following year (Sept-Dec income). Yes the periods aren't even — historical artifact of when Congress set them up. Pay each via Form 1040-ES (mail check), IRS Direct Pay (free, online from bank account), or EFTPS (free, more sophisticated). Late payment leads to underpayment penalties.

What's the safe-harbor rule?

You avoid underpayment penalties if you've paid (via withholding + quarterly estimates) at least: 100% of last year's total tax liability (110% if AGI > $150K), OR 90% of this year's actual tax liability. Easier to track 'last year's total' since you know that number. So you can make conservative quarterly payments based on last year's tax bill and adjust at year-end without penalty.

What deductions can I claim?

Schedule C lets you deduct legitimate business expenses: home office (percentage of rent + utilities for the dedicated workspace), equipment, software subscriptions, business meals (50% deductible), business mileage, professional development, business insurance, supplies. Plus retirement contributions (SEP-IRA up to 25% of net earnings, Solo 401(k) up to ~$70K combined, HSA if eligible). Track expenses systematically — every $100 deduction saves ~$25-40 in tax.

Should I form an LLC or S-corp?

Maybe, depending on income. Sole proprietor (default for freelancers): all income is SE-tax-eligible, simple. LLC: same tax treatment by default; offers liability protection. S-corp election: pay yourself a 'reasonable salary' (W2, with FICA withheld), take the rest as distributions (no SE tax). Worth it once net income is consistently above ~$50-80K — the SE tax savings exceed the additional administration costs (separate tax return, payroll, etc.). Talk to a CPA before electing S-corp; rules are tricky.

Money & Finance · Free tool

Freelancer Tax Reserve Calculator

Calculate the % of gross income to reserve for federal, self-employment, and state taxes — monthly set-aside in one click. Free, no sign-up.

Updated June 2026

Gross income ($)Filing statusState tax rate (%)

Recommended reserve

33.2%

$28,253 total tax

Quarterly payment

$7,063

Due Apr/Jun/Sep/Jan

Self-employment tax (15.3%)	$12,010
Federal income tax	$12,293
State income tax	$3,950
Total estimated tax	$28,253

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What it does

Calculate how much of every freelance dollar to set aside for taxes so you don’t get destroyed at year- end. The single biggest reason freelancers get into IRS trouble: spending the gross check, then realizing in April that 25-30% of it should have gone to estimated quarterly taxes. Enter your annual gross income, filing status, state, and the tool returns: monthly tax reserve amount, quarterly estimated payment due date chart, total annual federal + SE + state tax estimate, and your effective tax rate.

The math has three components most W2 workers don’t deal with:

Federal income tax: progressive brackets (10/12/22/24/32/35/37%) on taxable income. Same as W2 workers.
Self-employment (SE) tax: 15.3% on net earnings up to the Social Security wage base ($168,600 in 2025), plus 2.9% Medicare above that. This is BOTH the employer and employee FICA halves — W2 workers only see 7.65% on their paycheck because the employer pays the other half. Self-employed pay both. Half is deductible on income tax, slightly offsetting the burden.
State income tax: 0% (TX, FL, etc.) up to ~13.3% (CA top bracket). Local taxes (NYC, Philadelphia) on top in some cities.

Standard reserve guidance: 25-30% of gross for low-income-tax states (TX/FL/etc.), 30-35% for medium-tax states (NY, IL, NC), 35-40% for high-tax states (CA, NYC). The calculator gives a precise number for YOUR situation, not just an averaged rule of thumb.

Quarterly estimated taxes due: April 15, June 15, September 15, January 15 (following year). Pay via Form 1040-ES (mail), IRS Direct Pay (online), or EFTPS. Skipping quarterly payments leads to underpayment penalties (~3-8% annual rate on the underpaid amount). Don’t skip them unless your prior-year W2 withholding covered 100%+ of last year’s liability (the “safe harbor” rule).

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How to use it

Enter your annual gross income from freelance / 1099 work. If you have variable income, estimate the conservative case (high) so you over-reserve rather than under.
Pick filing status (Single, MFJ, MFS, HoH) — affects bracket thresholds significantly.
Pick your state — affects state-tax rate. Local taxes (NYC, Philly) are added if applicable.
Optionally enter business expenses you'll deduct (Schedule C) — those reduce taxable net income.
Read the monthly reserve %, quarterly payment estimates, and total annual tax. Set up auto-transfer from each freelance check to a separate savings account at this percentage.

When to use this tool

Setting up your freelance tax discipline at the start of a new business or fiscal year.
Estimating quarterly tax payments before April 15 / June 15 / September 15 / January 15 deadlines.
Sanity-checking a CPA's quarterly estimate.
Deciding whether to take a freelance gig — knowing the after-tax rate helps you negotiate the right rate.

When not to use it

Final tax filing — for that, use TurboTax, TaxAct, or hire a CPA who can handle Schedule C, business deductions, retirement contributions, and credits properly.
Multi-state freelancing where you work clients in multiple states — each state has its own apportionment rules; talk to a tax pro.
S-corp or LLC with elected tax treatment — those have different reserve math (you pay yourself a salary, take distributions, the apportionment changes).
Anyone with significant other income streams (real estate, capital gains, investment income) — those affect your bracket and complicate the simple-percentage approach.

Common use cases

Quick calculation during a typical workday
Pre-decision sanity-check on inputs and outputs
Educational use — demonstrating the underlying concept
Onboarding a colleague who needs the same calculation/conversion

Frequently asked questions

Why is self-employment tax so high?: Because you're paying BOTH halves of FICA: employer (7.65%) + employee (7.65%) = 15.3% on net earnings up to the Social Security wage base. W2 workers only see 7.65% on their paycheck — but their employer is also paying 7.65% on their behalf, that money never appears on the W2. So total FICA is the same; freelancers just feel all of it directly. Half of SE tax is deductible on income tax, partially offsetting the burden.
Should I save 25% or 30% or 35%?: Depends on your state and income level. For TX/FL/etc. (no state income tax) at moderate income: 25% covers federal + SE comfortably. CA at higher income: 35-40% needed. The calculator gives a precise number — better than a rule of thumb. Err on the higher side; over-reserving means a tax-time refund, under-reserving means scrambling to pay.
What's the quarterly estimated tax deadline?: April 15 (covers Jan-Mar income), June 15 (April-May income), September 15 (June-Aug income), January 15 of the following year (Sept-Dec income). Yes the periods aren't even — historical artifact of when Congress set them up. Pay each via Form 1040-ES (mail check), IRS Direct Pay (free, online from bank account), or EFTPS (free, more sophisticated). Late payment leads to underpayment penalties.
What's the safe-harbor rule?: You avoid underpayment penalties if you've paid (via withholding + quarterly estimates) at least: 100% of last year's total tax liability (110% if AGI > $150K), OR 90% of this year's actual tax liability. Easier to track 'last year's total' since you know that number. So you can make conservative quarterly payments based on last year's tax bill and adjust at year-end without penalty.
What deductions can I claim?: Schedule C lets you deduct legitimate business expenses: home office (percentage of rent + utilities for the dedicated workspace), equipment, software subscriptions, business meals (50% deductible), business mileage, professional development, business insurance, supplies. Plus retirement contributions (SEP-IRA up to 25% of net earnings, Solo 401(k) up to ~$70K combined, HSA if eligible). Track expenses systematically — every $100 deduction saves ~$25-40 in tax.
Should I form an LLC or S-corp?: Maybe, depending on income. Sole proprietor (default for freelancers): all income is SE-tax-eligible, simple. LLC: same tax treatment by default; offers liability protection. S-corp election: pay yourself a 'reasonable salary' (W2, with FICA withheld), take the rest as distributions (no SE tax). Worth it once net income is consistently above ~$50-80K — the SE tax savings exceed the additional administration costs (separate tax return, payroll, etc.). Talk to a CPA before electing S-corp; rules are tricky.

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