Your startup numbers
Upfront cost
$
Equipment, starting inventory, tools, setup. Example value.
Revenue per period
$
Example value. Use one period, such as a month, for every money and hours field.
Cost of goods and platform fees
$
Product cost, platform and payment fees, shipping paid by you.
Other business expenses
$
Software, supplies, ads, insurance share.
Vehicle or other costs
$
Optional. You may enter a mileage figure here.
Periods per year
12 if the period is a month, 52 if a week.
Paid hours per period
Hours doing the work itself.
Unpaid admin hours per period
Messaging, listing, bookkeeping, sourcing, shipping runs.
One-time ramp-up hours
Setup and learning time before it runs smoothly.
Spread ramp-up over
months
Months. Set ramp-up to 0 once it is behind you.
Tax inputs (yours, not looked up)
Marginal federal rate
%
Your top bracket, from the IRS rate schedule. Applied as a flat rate.
State and local rate
%
Use 0 if none. Flat rate, example value.
W-2 wages for the year
$
Used only to see how much Social Security wage base is left.
Social Security wage base
$
2026 figure, an input. Confirm at ssa.gov.
Apply self-employment tax
Untick if the income is not self-employment income.
Calculate
Reset
Result