What counts as business overhead?
Include costs the business must pay regardless of a specific job: software, insurance, rent, licenses, equipment, bookkeeping, marketing, phone, education, and similar operating expenses. Direct project costs belong in the project quote instead.
What should I use for billable time?
Solo service businesses often discover that billable time is materially below 100%. Review recent weeks, subtract sales, admin, travel, client communication, and gaps, then use the percentage you can sustain—not your best week.
Is the reserve a personal income-tax estimate?
No. The owner-income field is already a pre-tax target. Use the reserve for employer-side payroll taxes and business-funded benefits or retirement contributions beyond that target. Do not add personal income tax twice. Actual obligations vary by entity, location, and circumstances, so use qualified advice.
Should every client pay this exact rate?
Treat it as an internal pricing benchmark. Fixed-price work may command more because of speed, expertise, urgency, risk, or value. A difficult project can also require a contingency. What matters is that the effective rate does not quietly fall below your floor.