How Quarterly Estimated Taxes Work
If you earn income that is not subject to withholding (self-employment, freelance, investment, or rental income), the IRS expects you to pay taxes throughout the year via quarterly estimated payments. Failing to make adequate payments can result in an underpayment penalty, even if you pay the full amount when you file your return.
When Are Payments Due?
Quarterly payments are due four times per year: April 15, June 15, September 15, and January 15 of the following year. Note that the quarters are not evenly spaced. If a due date falls on a weekend or holiday, the payment is due on the next business day. You can pay using IRS Form 1040-ES, the IRS Direct Pay system, or EFTPS.
Frequently Asked Questions
What happens if I miss a quarterly payment?â–¾
If you miss a payment or underpay, the IRS charges an underpayment penalty based on the federal short-term interest rate plus 3 percentage points. The penalty is calculated separately for each quarter, so even one missed payment can trigger a penalty while other quarters may be fine.
Do I need to make quarterly payments if I have a W2 job?â–¾
If your W2 withholding covers your total tax liability, you may not need to make quarterly payments. However, if you have significant side income, you should either increase your W2 withholding (via Form W-4) or make quarterly estimated payments on the additional income.
What is the safe harbor rule?â–¾
The safe harbor rule protects you from underpayment penalties if you pay at least 100% of your prior year's tax (110% if your AGI was over $150,000) or 90% of your current year's tax. Meeting either threshold means no penalty, regardless of the actual tax owed.
Can I adjust my quarterly payments during the year?â–¾
Yes. If your income changes significantly during the year, you can use the annualized income installment method (Form 2210 Schedule AI) to adjust your payments. This is helpful if your income is seasonal or varies significantly between quarters.
Calclypso Editorial Team
Reviewed by certified financial professionals. Last updated: April 2026. Tax rates reflect 2025 IRS figures. This calculator provides estimates only and should not be used as tax advice.