Business Estimated Tax Calculator

Plan payments with deductions, credits, and withholding. See taxable income, self-employment tax, and safe harbor. Use responsive inputs, exports, examples, formulas, and charts easily.

Calculator inputs

This page estimates owner-level payments, not corporate vouchers.
Interest, dividends, rental spillover, wages, or other taxable income.
The calculator uses the higher of itemized or standard deductions.
Optional simplified state estimate applied to taxable income before QBI.
Use for AMT, NIIT, household employment tax, or manual adjustments.
Leave zero to use ordinary business profit as the QBI base.

Formula used

1) Ordinary business profit
Gross Receipts − Cost of Goods Sold − Operating Expenses − Depreciation
2) Self-employment earnings
Net Profit × 92.35%
3) Self-employment tax
Social Security Tax + Medicare Tax + Optional Additional Medicare Tax
4) Adjusted gross income
Total Income − Above-Line Adjustments − 50% of Self-Employment Tax
5) Taxable income before QBI
AGI − Greater of Standard Deduction or Itemized Deductions
6) QBI deduction estimate
Lesser of QBI Base × QBI Rate or 20% of Taxable Income Before QBI
7) Tax shown on return
Federal Income Tax + Self-Employment Tax + State Estimate + Other Taxes − Credits
8) Safe harbor annual target
Lesser of 90% of current-year tax or 100% / 110% of prior-year total tax

The state section is intentionally simplified. Enter a manual state rate or place nonstandard items in the Other Taxes field.

How to use this calculator

  1. Choose your filing status and the next estimated payment due date.
  2. Enter yearly business revenue, direct costs, operating expenses, and depreciation.
  3. Add retirement, health insurance, other adjustments, credits, withholding, and prior-year tax data.
  4. Turn QBI and self-employment options on or off as needed.
  5. Click Calculate Estimated Tax to view results above the form.
  6. Review both targets: full projected liability and safe-harbor payments.
  7. Use the chart and payment schedule to plan each remaining due date.
  8. Download a CSV or PDF summary for records or client review.

Example data table

Example field Sample value
Filing statusSingle
Gross receipts$180,000.00
Cost of goods sold$25,000.00
Operating expenses$38,000.00
Depreciation$7,000.00
Other taxable income$6,000.00
Retirement contributions$9,000.00
Health insurance$4,500.00
Other above-line adjustments$1,200.00
Itemized deductions$10,000.00
Nonrefundable credits$1,200.00
Federal withholding$3,000.00
Prior-year total tax$16,500.00
Prior-year AGI$98,000.00
Next due quarterQ1 - Apr 15, 2026

FAQs

1) What does this calculator estimate?

It estimates owner-level quarterly payments for pass-through business income. It projects taxable income, self-employment tax, safe-harbor targets, and remaining installment amounts.

2) Can I use it for a C corporation?

No. This page is built for owner-level estimated taxes. C corporations usually follow different rules, forms, and entity-level payment workflows.

3) Why are there two payment targets?

One target funds the full projected tax bill. The other targets safe harbor, which is useful when you want to reduce underpayment risk without paying the full projected liability immediately.

4) Does the calculator handle self-employment tax?

Yes. It estimates Social Security and Medicare tax from self-employment earnings and also deducts one-half of that tax when calculating adjusted gross income.

5) How does the QBI field work?

You can let the page estimate QBI from business profit or enter a manual QBI base. This is a practical estimator, not a full limitation engine.

6) What if income changes later in the year?

Re-enter updated numbers and choose the next due quarter. The calculator will spread the remaining required amount over the remaining installments.

7) Does the state tax rate replace a real state return?

No. The state field is a shortcut for planning. Actual state estimated tax rules, deductions, and credits vary by jurisdiction.

8) Can I export the results?

Yes. After calculating, use the CSV button for spreadsheet work or the PDF button for a portable summary you can share or archive.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.