Estimated tax safe harbor: how gig workers avoid the underpayment penalty (2026)
The IRS charges a penalty when you do not pay enough estimated tax during the year, or pay it late. You generally do not owe it if you meet one of the "safe harbor" tests below. This page lists what the IRS says, with links, so you can check each rule yourself.
The three tests (general rule)
- You owe less than $1,000 on your return after subtracting withholding and refundable credits. Source: IRS: Underpayment of estimated tax by individuals penalty · last verified 2026-10-17
- You paid at least 90% of this year's tax through withholding and on-time estimated payments, or
- You paid at least 100% of last year's tax, whichever of the two is smaller. Last year's return must cover all 12 months. Source: IRS Form 1040-ES (2026), General Rule · last verified 2026-10-17
For 2026 that means the smaller of 90% of the tax on your 2026 return or 100% of the tax on your 2025 return. You also do not have to pay 2026 estimated tax if you were a U.S. citizen or resident alien for all of 2025 and had no tax liability for 2025. Source: IRS Form 1040-ES (2026) · last verified 2026-10-17
Special rules
- Higher income: if your 2025 adjusted gross income (AGI) was more than $150,000 ($75,000 if married filing separately for 2026), use 110% of last year's tax instead of 100%.
- Farming or fishing: if at least two-thirds of your gross income for 2025 or 2026 is from farming or fishing, use 66 2/3% instead of 90%, and the 110% rule does not apply. Source: IRS Form 1040-ES (2026), Special Rules · last verified 2026-10-17
- Skipping the January payment: you do not have to make the payment due Jan 15, 2027 if you file your 2026 return by Feb 1, 2027 and pay the entire balance with it. Source: IRS Form 1040-ES (2026), payment due dates · last verified 2026-10-17
- Uneven income: if you earn most of your money late in the year or seasonally, the annualized income installment method (Form 2210, Schedule AI) may lower or remove the required payment for earlier periods. See chapter 2 of IRS Pub. 505.
Worked example (made-up numbers)
Example only, not real taxpayer data. Say your total tax on last year's full-year return was $4,000, your AGI was under $150,000, and you expect this year's tax to be $6,000 because your gig income grew.
| Test | Amount |
|---|---|
| 90% of this year's expected tax (90% x $6,000) | $5,400 |
| 100% of last year's tax | $4,000 |
| Smaller of the two (required total) | $4,000, or $1,000 per quarterly date |
Paying $1,000 by each due date would generally meet the safe harbor even though you still owe the remaining $2,000 when you file. The estimator shows both lines for your own numbers. Paying less than required, or paying late, can still trigger a penalty for that quarter.
If you already missed a payment
- The IRS figures the penalty from the amount underpaid, how long it was underpaid, and its published quarterly interest rates, and it sends a notice if you owe it. Paying in full as soon as you can stops more penalty and interest from adding up.
- The IRS may remove or reduce the penalty after a casualty, disaster or other unusual circumstance, or if you retired after age 62 or became disabled in the past 2 years and had reasonable cause. Form 2210 is used for the reduction methods. Source: IRS: Underpayment of estimated tax by individuals penalty · last verified 2026-10-17
Next federal dates: see the due-date table. State rules differ; check the state finder. This is general information, not tax advice; a licensed preparer can apply the rules to your return.