Side hustle income scenarios calculator.

How it is calculated

Each scenario is run through the same engine as the net hourly pay calculator (profit, SE tax, income tax, hours). You type a weight for each case; the weights must add up to 100 or the page asks you to fix them. Weighted after-tax profit = Σ weight × after-tax profit. Weighted hours works the same way and weighted net per hour divides the two. The page also shows the worst and best cases and the total weight you put on cases that do not cover your upfront cost.

Why this is not a chance-of-success estimate

There is no source in this page for how often hustles of any kind work out, and published figures vary widely by definition, period and who was counted. So the weights are an assumption you make and can stress-test: try moving 10 points from base to low and see what changes. The output is a way to think about spread and downside, not a forecast.

Worked example (illustrative inputs)

Low case: no revenue and $600 of costs. Base: $8,000 revenue, $1,600 goods and fees, $1,000 expenses, 300 hours. High: $20,000 revenue, $4,000 goods and fees, $2,000 expenses, 400 hours. With weights 30 / 50 / 20, the after-tax results are low -$600.00, base $3,282.01, high $8,508.91, giving a weighted $3,162.79 over 290 weighted hours ($10.91 per hour) and $2,662.79 in year one after a $500 upfront cost. Change the weights to 60 / 30 / 10 and the weighted figure drops; that sensitivity is the point. All numbers are examples, not typical earnings.

What this does not cover

• The 0.9% Additional Medicare Tax on high earnings.
• The qualified business income (QBI) deduction, the standard or itemized deduction, credits, and bracket changes caused by the extra income: the model applies one flat marginal rate you choose.
• State self-employment rules, local taxes, sales tax and the details of any one platform’s fees: enter them as costs.
• Quarterly estimated-tax timing and penalties (see estimated tax due dates).
• The value of your time at other uses, burnout, and whether the work is enjoyable.
• More than three cases, or outcomes outside your low and high cases.
• Losses carried into other years or against other income.

Method and sources

Sources: IRS Topic no. 554, Self-employment tax (15.3% total, 12.4% Social Security plus 2.9% Medicare, on 92.35% of net earnings; half of the tax is deductible; retrieved 2026-10); Instructions for Schedule SE (Form 1040) ($400 net-earnings rule and the Social Security earnings limit; retrieved 2026-10); SSA contribution and benefit base (the Social Security wage base; the tool starts from $184,500 for 2026 and lets you overwrite it; this page could not be re-opened automatically in 2026-10, so confirm the current figure there; our own taxable maximum by year page lists it); IRS 2026 inflation adjustments (the seven federal rates, 10% to 37%, and their income thresholds; retrieved 2026-10). Your marginal federal rate is an input, not a lookup. All scenario values, weights and rates are inputs.