Safe Harbor Rule

Definition

IRS provision that protects taxpayers from underpayment penalties if they pay either 100% of last year's tax (110% if income over $150k) or 90% of current year's tax.

Related Terms

Underpayment Penalty

IRS penalty charged when taxpayers don't pay enough estimated taxes throughout the year. Currently about 8% annual rate on the underpaid amount.

FAQs

What is the 110% safe harbor?

If your AGI exceeds $150k, pay 110% of last year's tax to avoid penalties regardless of current income.

Similar Terms

1099 Form

IRS tax form reporting income paid to non-employees, commonly 1099-NEC for contractor pay or 1099-K for payment platforms.

1099-K

Tax form reporting payments from payment networks like PayPal or gig platforms when exceeding annual thresholds.

1099-NEC

Tax form for non-employee compensation of $600 or more, replacing Box 7 of the old 1099-MISC for contractor payments.

Self-Employment Tax

Social Security and Medicare taxes for self-employed individuals, totaling 15.3% on net earnings.

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Last updated: January 18, 2026

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