US Estimated Quarterly Taxes: Who Pays, When and How Much

The US tax system is pay-as-you-go. Employees meet that rule automatically because their employer withholds tax from every paycheck. If you earn money that nobody withholds tax from — freelance fees, gig-platform payouts, rental income, large investment gains — the IRS expects you to send that tax yourself during the year through estimated payments. Waiting until April and paying everything in one go is the most common reason self-employed people are charged an underpayment penalty.

As a rule of thumb, you need to make estimated payments if you expect to owe at least $1,000 in federal tax for the year after subtracting withholding and refundable credits. Most first-year freelancers cross that line quickly, because on top of income tax they also owe self-employment tax of 15.3% on net earnings, which covers Social Security and Medicare.

Payments are made four times a year. The usual due dates are April 15 for income earned January to March, June 15 for April and May, September 15 for June to August, and January 15 of the following year for September to December. When a date falls on a weekend or federal holiday, it moves to the next business day. Notice that the periods are uneven — the second "quarter" is only two months long — which catches many people out.

The simplest way to avoid a penalty is the safe-harbor rule. You are generally protected if your total withholding and estimated payments equal at least 90% of this year's tax or 100% of last year's tax, whichever is smaller. If your adjusted gross income last year was above $150,000 ($75,000 if married filing separately), the prior-year figure rises to 110%. For people whose income is growing, paying a quarter of last year's total tax each quarter is a reliable, low-stress approach.

If your income is irregular, the annualized income installment method on Form 2210 lets you match payments to when you actually earned the money. A designer who lands most contracts in the autumn, for example, can pay less in April and June and more later, without a penalty, as long as the calculation supports it.

Paying is straightforward. You can use IRS Direct Pay from a bank account, the Electronic Federal Tax Payment System (EFTPS), a debit or credit card through an approved processor, or your IRS Online Account. Keep the confirmation number for each payment, because you will report the total on your Form 1040. Most states with an income tax run a similar quarterly system, so check your state revenue department as well.

A practical habit: every time a client pays you, move a fixed percentage — often 25% to 30% for a typical freelancer — into a separate savings account reserved for tax. When a due date arrives, the money is already there. Use our US tax calculator to estimate your annual liability, divide by four, and adjust after each quarter as your real income becomes clearer.

This article is general guidance based on IRS publications such as Form 1040-ES and Publication 505. Your exact obligations depend on your full situation, so consider a CPA or enrolled agent if your income is complex.