Contractor tax reserve: plan from profit, not deposits
Contractor tax planning gets clearer when you estimate from business profit after ordinary expenses, not from every dollar deposited.
A rough tax reserve should start with net profit. Revenue that will be spent on delivery costs should not be treated like take-home income.
Separate revenue from profit
Deposits can feel like income, but materials, subcontractors, software, equipment, mileage, and other business expenses may reduce taxable profit.
Keep self-employment tax visible
Contractors often need to consider both income tax and self-employment tax. A single flat percentage can hide why the reserve feels high.
Confirm deadlines and safe-harbor rules
Quarterly payment timing, deductions, credits, spouse income, and prior-year safe-harbor rules can change the actual payment plan.