Free 2026 calculator

Skip the quarterly tax guesswork

Estimate what to pay, what to set aside each month, and when the next standard federal deadline arrives

1099 and business incomeSelf-employment tax includedNo email required

NEXT STANDARD 2026 DEADLINESeptember 15

For the June 1–August 31 payment period

YOUR NUMBERS

Build a quarterly estimate

Enter annual estimates before personal income taxes and state taxes

Annual 1099 or business income

Gross income before business expensesEstimated business expenses

Ordinary and necessary expenses you expect to qualifyPlanning income tax rateA rough marginal rate for planning—not your effective rateAnnual withholding and tax payments

Include expected W-2 withholding and estimated payments

2026 DIRECTIONAL ESTIMATEBased on $72,000 net profit

Estimated quarterly payment$6,224$2,075 monthly set-aside

Self-employment tax: $10,173
Simplified federal income tax: $14,721
Less withholding and payments: −$0
Estimated annual amount: $24,894

NEXT STANDARD 2026 DEADLINESeptember 15, 2026Calendar-year taxpayers · special and disaster rules may change your date

Educational estimate only. It excludes state and local tax, credits, other household income, Additional Medicare Tax, entity elections, special deductions, and prior-year safe-harbor rules

Find what I may be missing

Keep the dates visible

Four payment periods—not four equal quarters

The federal calendar uses uneven payment periods. Your actual obligation can also change with withholding, income timing, safe-harbor rules, and disaster relief

January 1–March 31

April 15, 2026

April 1–May 31

June 15, 2026

June 1–August 31

September 15, 2026Next standard deadline

September 1–December 31

January 15, 2027

Quick answers

Quarterly taxes without the surprise

Who may need quarterly estimated payments

People with income that does not have enough tax withheld—including many freelancers, independent contractors, creators, and business owners—may need estimated payments

Are quarterly payments always equal

Not necessarily. Income that changes during the year, prior-year safe-harbor rules, withholding, credits, and special circumstances can change the amount or timing

Does this include state tax

No. This calculator gives a simplified federal planning estimate. State and local tax rules vary and should be added separately

Standard payment periods and dates follow IRS Publication 505 for 2026. Use Form 1040-ES or a tax professional for a filing-ready calculation

Knowing what to pay is step one

See what could lower the number

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