Business tax guide
W-2 and 1099 Tax Planning
Two income streams need one tax plan.
Help mixed-income workers compare extra withholding and quarterly payments.
Run the related calculatorCombine withholding and 1099 income
Mixed W-2 + 1099 Planner
Estimate the 1099 side
Self-Employed Tax
The mistake
People often ask which income is taxed. The practical question is whether withholding plus estimated payments covers the whole picture.
The better move
Model extra withholding and quarterly payments side by side so cash flow, timing, and reserve behavior are visible.
Tax planning boundary
This guide is educational planning content. Tax rules, thresholds, forms, deadlines, and state rules can change. Use the linked calculators to expose assumptions, then verify filing positions with current IRS forms, tax software, or a qualified tax professional.
For a useful first pass, enter conservative numbers and save the aggressive assumptions for a separate scenario. The page is meant to show which variable deserves attention: income timing, deduction proof, payroll cost, reserve percentage, entity choice, or the gap between booked income and cash actually collected.