Why Estimated Taxes Exist
The U.S. tax system is pay-as-you-go. Employees have taxes withheld from every paycheck. Self-employed people don't — so the IRS requires quarterly estimated tax payments if you expect to owe $1,000 or more when you file.
If you don't make estimated payments and owe a large amount at filing, the IRS charges an underpayment penalty.
Due Dates
| Quarter | Income Period | Payment Due |
|---|---|---|
| Q1 | January – March | April 15 |
| Q2 | April – May | June 15 |
| Q3 | June – August | September 15 |
| Q4 | September – December | January 15 (next year) |
Tip
Set calendar reminders for these dates. Missing a quarterly payment triggers a penalty even if you pay the full amount by April 15.
How Much to Pay
Safe Harbor Method (Easiest)
Pay 100% of last year's total tax, split into four equal payments. If your prior-year AGI was above $150,000 ($75,000 MFS), the safe harbor is 110% of last year's tax.
This guarantees no underpayment penalty regardless of how much you owe this year.
Current-Year Method
Estimate this year's income and pay 90% of your expected tax in quarterly installments. More accurate but requires forecasting.
| Method | What you pay | Penalty risk |
|---|---|---|
| Safe harbor (100%/110%) | Prior year's tax / 4 | No penalty guaranteed |
| Current year (90%) | Estimated current tax / 4 | No penalty if accurate |
| Pay nothing | Wait until April | Penalty if you owe $1,000+ |
How to Pay
- IRS Direct Pay (irs.gov/payments) — free, pay from bank account
- EFTPS (Electronic Federal Tax Payment System) — free, requires enrollment
- IRS2Go app — mobile payment option
- Credit/debit card — processing fee applies
Use Form 1040-ES vouchers if paying by mail.
Who Needs to Pay
You probably need estimated payments if:
- You have self-employment income (freelance, gig work, business)
- You have significant investment income without withholding
- You have rental income
- You changed jobs and had a gap in withholding
Info
If you also have a W-2 job, you can increase your W-2 withholding instead of making estimated payments. Adjust your W-4 with your employer to withhold extra each paycheck. This counts the same as quarterly payments.