Planning workbooks
An annual tax estimate you can update in one sitting
Create a repeatable baseline, forecast remaining income, separate liability from payments and document the gaps before changing your tax plan.
Planning workbooks
Work through income tax, business profit and payment scenarios step by step.
Turn records into a usable estimate. This collection walks through the arithmetic behind our calculators and shows how to separate tax liability from cash you need to reserve. Every example is illustrative, with assumptions you can change. Start with the planning workflow, then follow the specific guide for wages, freelance income, uneven earnings or a possible deduction. The goal is a repeatable worksheet, not a promised refund or a tax strategy sold without your facts. Keep a separate line for state and local taxes and review federal withholding alongside estimated payments. Where an example intentionally leaves out a credit, capital gain or payroll tax, that exclusion is part of the calculation and should remain visible when you reuse the worksheet.
Guides in this topic
Planning workbooks
Before buying for a write-off, compare the after-tax cash cost
Review eligibility, timing and business purpose before assuming a purchase saves money. Use an explicit illustrative deduction example.
Planning workbooks
2026 estimated tax payments: target and timing are different
Compare the general annual safe-harbor targets, subtract withholding and keep payment dates separate from the amount still unpaid.
Planning workbooks
Build a tax reserve from a forecast, not a universal percentage
Turn an annual tax estimate into a transparent cash reserve, separate transfers from tax payments and update the plan when profit changes.
Planning workbooks
Uneven freelance income: forecast by period, not one good month
Organize seasonal or late-year income, compare realistic annual scenarios and prepare the records needed for a payment-timing review.
Planning workbooks
W-2 job plus freelance work: connect the tax layers
Combine wages and sole-proprietor profit without double counting expenses, missing self-employment tax or confusing payroll taxes with withholding.
Planning workbooks
Year-end withholding review: use actual pay records
Project remaining federal income tax withholding, compare the household forecast and verify payroll timing before making a late-year change.