Annual set-aside target
$18,000
Based on estimated annual net profit of $72,000.
Free quarterly tax tool
Quarterly tax set-aside calculator for self-employed income
Turn expected profit into a practical tax savings target, then use Cadus to keep income, expenses, deductions, receipts, and reports organized.
Interactive estimator
Quarterly Tax Set-Aside Calculator
IRS Publication 505 lists the 2026 estimated tax due dates as April 15, June 15, September 15, and January 15, 2027, for calendar-year taxpayers.
2026 due date
April 15, 2026
Target: $4,500
2026 due date
June 15, 2026
Target: $4,500
2026 due date
September 15, 2026
Target: $4,500
2026 due date
January 15, 2027
Target: $4,500
Remaining to save
$16,500
After subtracting amounts already saved and payments already made.
Before you rely on it
This is a cash-flow planner, not a precise tax return calculation.
Federal, state, and local tax rules can all affect the final amount.
A tax professional can help choose a better set-aside percentage for your situation.
What this tool uses
This tool uses your chosen set-aside percentage, not a full federal or state tax calculation.
2026 calendar-year estimated tax due dates are April 15, June 15, September 15, and January 15, 2027.
Estimated tax requirements depend on income, withholding, credits, prior-year tax, and other facts.
Best for
Self-employed workers who want a monthly savings target for quarterly taxes.
Freelancers and contractors estimating tax cash flow before payments are due.
Small business owners who want tax planning connected to income and expense reports.
How to use the estimate
Choose a rate
Pick a set-aside percentage that fits your income, state, and tax situation.
Save monthly
Turn expected monthly profit into a savings target before quarterly due dates arrive.
Reconcile
Use organized income and expense reports to refine the estimate throughout the year.
Why Cadus helps after the calculator
Estimates are useful, but records win tax season
Cadus helps make tax set-asides less blind by keeping income, deductible expenses, mileage, receipts, invoices, and reports in one mobile workflow.
Download CadusRelated Cadus services
Quarterly and yearly tax planning
Quarterly Tax Estimator
Estimate quarterly and yearly tax obligations with cleaner income, expense, and deduction records in Cadus for U.S. self-employed workers.
Income tracking
Income Tracking App
Track income, invoices, payments, expenses, and profit in Cadus, a mobile app for U.S. freelancers, contractors, and small business owners.
Related guides
Use case
Quarterly Tax Estimator for Self-Employed Expenses
Estimate quarterly taxes with better self-employed expense records in Cadus: income, receipts, deductions, mileage, P&L reports, and tax summaries.
Learn
Quarterly Estimated Taxes
Learn how IRS quarterly estimated taxes work for self-employed workers, including Form 1040-ES, withholding, credits, and recordkeeping.
More free Cadus tools
Free mileage tool
Mileage Deduction Calculator
Estimate a 2026 business mileage deduction using the IRS 72.5 cents-per-mile rate, then track mileage, expenses, receipts, and tax records in Cadus.
Free home office tool
Home Office Deduction Calculator
Estimate a simplified home office deduction using the IRS $5 per square foot method, up to 300 square feet, and organize records in Cadus.
Free contractor tool
1099 Contractor Payment Tracker
Track contractor payments against the current 2026 Form 1099-NEC planning threshold, then organize W-9s, expenses, reports, and records in Cadus.