Taxes · Practical tool
Year-end tax-planning worksheet
Organize three scenarios, compare known totals and identify the tax estimates and deadlines still needed.
This worksheet organizes planning inputs for a selected tax year. It does not calculate AGI, taxable income, tax liability, eligibility, penalties or Medicare premiums. Use a current tax projection to supply the estimated liability when you have one.
Enter baseline income items only once, using the taxable amounts identified in your projection. Record additional planned income or reductions separately. The income-item total is arithmetic, not an IRS-defined income measure. Deductions are displayed separately and are not automatically subtracted to manufacture taxable income.
Withholding and estimated payments are tax payments. Enter the expected full-year total for each scenario on the same basis as the supplied liability estimate. Do not combine federal-only tax with federal-plus-state payments. Blank liability or payment fields leave the expected balance unknown.
Method and timing
Income-item total = baseline taxable income items + planned additional income − planned income reductions. Known payments = withholding + estimated payments. Expected balance = user-supplied tax liability less complete expected payments; a negative result represents an estimated overpayment. The tool compares alternative scenarios with the baseline when both inputs are known.
A positive expected balance does not calculate an underpayment penalty, and a zero balance does not prove payment timing met every requirement. Record institution deadlines and the source of each tax estimate in the notes.
For Medicare, the tool labels the usual two-year lookback relationship only: the selected income year may affect premiums two years later. It does not supply thresholds or decide an appeal. Review retirement-income tax interactions and use the planning guide to complete the action list.
This calculator code runs in your browser without transmitting or tracking entries; general website analytics are separate. A reload resets the examples; browser form-restoration behavior may vary. Export if you want to keep the worksheet; do not include tax IDs, account numbers or other personal identifiers.
