Quarterly Estimated Tax Set-Aside Tracker (US)

If you're self-employed in the US, nobody withholds tax for you. This workbook helps you put money aside as you're paid, see what's due each quarter, and check your payments are keeping up. It's a planning and record-keeping tool, not tax advice.

Log income (up to 800 payments) and business expenses (up to 1,000), marking anything not deductible. Each row lands in its IRS payment period automatically (Jan–Mar, Apr–May, Jun–Aug, Sep–Dec). The Quarterly Summary works out net profit per period and a federal and a state set-aside at percentages you choose with your tax professional, calculated on profit so far so an early loss is offset later. Record each estimated payment with its confirmation number, and the workbook compares paid with set-aside, counts days to each due date and shows the status. A Tax Savings log shows whether the money is actually in the account. The Safe Harbor sheet compares your federal payments with the 90% of this year / 100% (or 110%) of last year rule as the IRS describes it, in four equal installments less withholding.

Payment periods and due dates are editable inputs. Defaults are for tax year 2027 (Apr 15, Jun 15, Sep 15, 2027 and Jan 18, 2028, because Jan 15 is a Saturday and Jan 17 is Martin Luther King Jr. Day), with IRS.gov sources checked Nov 9, 2026. Verify them with the IRS and your tax professional.

Included: worked-example and blank workbooks (9 sheets, 3,234 formulas; the example is a fictional freelance designer), plus a 4-page PDF guide in US Letter and A4. Google Sheets copy: pending.

Planning only. Not tax, legal or accounting advice.