Quarterly Estimated Taxes for Self-Employed (2026 Safe Harbor)
Pay either 100% of last year's tax (110% if AGI > $150k) or 90% of this year's — whichever is smaller — to avoid the underpayment penalty.
The IRS expects taxes to be paid as income is earned. For self-employed and 1099 workers, that means quarterly estimated payments using Form 1040-ES. Miss the safe harbor and the IRS adds an underpayment penalty regardless of whether you owe at filing.
Frequently Asked Questions
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