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There is no single percentage of gross income that every high earner should save for federal taxes. For 2026, estimate your total federal tax, subtract withholding and refundable credits, then check whether you meet the IRS estimated-tax payment rules. The safe-harbor calculation helps avoid an underpayment penalty; it does not tell you your final tax bill or prescribe a personal savings rate.
How to calculate your federal estimated-tax target
Use the 2026 Form 1040-ES worksheet to estimate your federal income tax and any applicable self-employment or other taxes. Include expected withholding and refundable credits. Do not apply a generic percentage to gross income: deductions, credits, income sources, and withholding all affect the calculation. The IRS explains the worksheet and rules in Publication 505.
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- Estimate your 2026 total federal tax. Use the Form 1040-ES worksheet and your best current estimate of income, deductions, credits, and applicable taxes.
- Subtract expected federal withholding and refundable credits. If the expected amount remaining is less than $1,000, the general estimated-tax payment requirement usually does not apply.
- Check the required annual payment. In general, compare 90% of your expected 2026 tax with the applicable percentage of your 2025 tax. The required annual payment is generally the smaller amount.
- Account for payments and timing. Count withholding and estimated payments toward the required amount, and check whether enough was paid by each installment date.
- Update the estimate as circumstances change. Revisit it after changes in salary, bonuses, equity vesting, investment or business income, deductions, or credits.
The $1,000 test and safe-harbor comparison answer different questions: the first is part of deciding whether estimated payments are generally required; the second helps determine how much must be paid on time to avoid an underpayment penalty. Neither is a universal savings-rate recommendation.
How the high-income safe harbor works in 2026
For the prior-year comparison, the general threshold is 100% of your 2025 tax. If your 2025 adjusted gross income was more than $150,000—or more than $75,000 if you are married filing separately—the threshold generally rises to 110% of your 2025 tax. The alternative comparison is generally 90% of expected 2026 tax. These percentages and income thresholds are the IRS’s 2026 federal rules; see Publication 505.
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For example, a taxpayer above the applicable 2025 AGI threshold compares 90% of expected 2026 tax with 110% of 2025 tax. The smaller figure is generally the required annual payment for the safe-harbor calculation. The taxpayer still needs to account for withholding, credits, and installment timing, and may owe more when filing the 2026 return.
Withholding or estimated payments?
Both can count toward the federal payment requirement. If you receive wages, you can ask your employer to withhold more by submitting an updated Form W-4. This can be simpler than making separate estimated payments, especially when wage income is steady. If your income is not subject to enough withholding—for example, some business or investment income—you may need estimated payments.
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For the IRS underpayment calculation, withholding is generally treated as paid evenly across the installment periods, even if it was actually withheld later. You may instead use actual withholding dates. That distinction can matter if you increase withholding late in the year; Publication 505 describes the timing rules and calculation options.
2026 estimated-tax payment dates
For calendar-year individual taxpayers, the ordinary federal estimated-tax dates for 2026 income are:
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| Payment period | Due date |
|---|---|
| First | April 15, 2026 |
| Second | June 15, 2026 |
| Third | September 15, 2026 |
| Fourth | January 15, 2027 |
These are the ordinary dates listed in the IRS’s 2026 Publication 505. A weekend or legal holiday moves a due date to the next qualifying day. You may pay the full estimated amount by the first date or pay in installments, but each installment must meet its period’s requirement to avoid a potential penalty. A later payment—or a refund when you file—does not necessarily erase a shortfall from an earlier period.
What to do when income arrives unevenly
A large bonus, stock sale, or other one-time receipt does not automatically mean you must make a standard quarterly payment solely because the income was large. The IRS says, “A sizable capital gain by itself may not give you a requirement to make a quarterly estimated tax payment.” See the IRS estimated-tax FAQ, under “Large gains, lump-sum distributions, etc.”
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If income arrives unevenly, the annualized income installment method may better match required payments to when income was earned. It calculates installments using income accumulated during parts of the year rather than treating the full year’s income as evenly earned. To use this method, the IRS directs taxpayers to Schedule AI of Form 2210 with the return. It is a calculation method, not an automatic exemption from estimated payments; check the details in Publication 505.
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Federal rules do not determine your state tax savings
State and local income-tax obligations are separate from the federal calculation. Their payment schedules, thresholds, and safe harbors depend on where you live and, in some cases, where you earn income. The federal percentages and dates above should not be applied to state or local taxes; check the relevant tax authority’s guidance or consult a qualified tax professional.
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When a personalized calculation matters
The IRS worksheets provide a federal framework, but the amount to set aside for your own cash flow depends on your full tax picture. Consider help from a CPA, enrolled agent, or other qualified tax professional if you have equity compensation, pass-through or self-employment income, a large investment gain, changing income during the year, or tax obligations in multiple jurisdictions. A professional can help distinguish the amount you may need to pay during the year from the larger or smaller final amount due when you file.
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