Calculate how much to pay in quarterly estimated taxes to avoid IRS underpayment penalties as a freelancer.
Invoicing, Tax & Tools
Bill clients, track time, and file taxes — software built for the self-employed
As a freelancer, nobody withholds taxes from your paychecks. The IRS requires you to estimate and pay taxes four times per year — miss these payments and you'll face an underpayment penalty, currently around 8% annually on the shortfall.
The safest approach is the safe harbor rule: pay 100% of last year's total federal tax bill (110% if your prior year AGI exceeded $150,000), divided across four equal quarterly payments. This guarantees no underpayment penalty regardless of how much you earn this year.
If you're new to freelancing with no prior year reference, estimate your current year's tax: calculate your expected net income, apply SE tax (15.3% × 0.9235), subtract half of SE tax to get adjusted income, apply your federal bracket, and pay 90% of that total in quarterly installments.
Set up automatic transfers to a dedicated tax savings account every time a client pays you. Aim to set aside 25-35% of each payment. This way, quarterly payment deadlines become a non-event — the money is already sitting there.
Quarterly Tax
Estimated tax payments made four times per year by freelancers to cover income and self-employment tax owed to the IRS.
Self-Employment Tax
The 15.3% US tax paid by freelancers covering both the employer and employee portions of Social Security and Medicare.
Take-Home Pay
The net income a freelancer keeps after paying all taxes, business expenses, health insurance, and other deductions from gross revenue.
Q1: April 15 | Q2: June 15 | Q3: September 15 | Q4: January 15 of the following year. When a date falls on a weekend or holiday it shifts to the next business day. Missing these dates triggers an underpayment penalty, currently around 8% annually on the unpaid amount.
The safe harbor protects you from underpayment penalties if you pay either: (1) 100% of last year's total tax (110% if prior year AGI exceeded $150,000), OR (2) 90% of the current year's estimated tax. Meeting either threshold means no penalty even if you owe at filing.
Use IRS Direct Pay at irs.gov/directpay (free, instant), the EFTPS system (Electronic Federal Tax Payment System), or mail a check with Form 1040-ES voucher. Most states also require separate quarterly payments — check your state's tax authority website.
You can use the 'annualized income installment method' (Form 2210, Schedule AI) to match your payments to actual quarterly income rather than equal quarterly amounts. This prevents overpaying in slow quarters and underpaying in busy ones.
Self-Employment Tax Calculator
Estimate your self-employment tax (SE tax), federal income tax, and total tax bill as a freelancer or independent contractor.
Take-Home Pay Calculator
Calculate your true freelance take-home pay after self-employment tax, income tax, business expenses, health insurance, and retirement contributions.
Emergency Fund Calculator
Calculate how large your emergency fund should be as a freelancer and how much more you need to save.