Log write-offs through the year and see what each is really worth — after self-employment tax, not just your income tax bracket.
Sets your marginal rate, which decides what each deduction saves.
Above the Social Security wage base, deductions are worth less — this accounts for it.
| Date | Purpose | Miles | Rate | Value |
|---|
Space used regularly and exclusively for business.
Rent or mortgage interest, utilities, insurance, repairs, property tax.
| Item | Cost | Business % | Treatment | This Year |
|---|
| Category | Description | Amount | Business % | Deductible |
|---|
Business meals are limited to 50%; the category applies that automatically. Phone and internet should reflect the share you genuinely use for work.
| Category | Deduction | Tax Saved | Net Cost |
|---|
Net cost is what the expense really cost you once the tax saving is netted off — a $1,000 write-off at a 34.6% effective rate genuinely costs $654.
Everything stays in your browser — nothing is uploaded. Estimates only, not tax advice. Deduction rules have conditions this tool doesn't check (exclusive-use tests, listed-property limits, Section 179 income caps, passive activity rules). Talk to a CPA before filing. See our disclaimer.