Why quarterly exists
The US system is pay-as-you-go. With no employer withholding, freelancers are expected to pay tax as income arrives, in four instalments.
Usual federal dates: April 15, June 15, September 15, and January 15 (next year). If a date is a weekend/holiday, it moves to the next business day.
Do you have to pay quarterly?
Not always. You may not need to if:
- Withholding from a W-2 job already covers your freelance tax, or
- Your total tax after withholding/credits is small enough under IRS safe-harbour rules, or
- Your freelance profit is very small.
The IRS safe harbours generally let you avoid an underpayment penalty if you pay at least 90% of the current year’s tax, or 100% of last year’s tax (110% at higher incomes) — check the current Form 1040-ES instructions for your year, because thresholds change.
A simple set-aside habit
When a client pays you, move 25–30% to a separate savings account the same day. Treat it as “not my money.” This is a cash-flow habit, not your tax rate. At quarter-end, use your actual profit to estimate the payment — or use the IRS Tax Withholding Estimator and Form 1040-ES worksheet.
How to pay
Federal: IRS Direct Pay, EFTPS, or a voucher with Form 1040-ES by mail. State: your state’s tax agency — many states have their own estimated-payment system and due dates.
Keep every payment confirmation with your tax folder. Your return will reconcile estimated payments against total tax due.
If you missed a quarter
Pay as soon as you can. A late payment may still reduce interest, and catching up in Q4 is better than waiting until April. If you received a penalty notice, read it carefully — first-time penalty relief may be available in some cases.
Next: The Complete First 1099-NEC Guide · Recordkeeping System