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Side Hustle Profit and Reserve Calculator

Calculate monthly side-business cash surplus, a chosen reserve and returns per recorded hour. Keep losses visible and save documented comparisons.

Use this result well

Inputs that matter
Monthly receipts before fees, Customer refunds paid this month, Platform and payment fees, Other cash operating costs, and 3 more
Output to expect
Monthly profit and reserve
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Cash operating surplus

Use one month consistently and count each cost once.

Surplus = receipts − refunds − fees − cash operating costs

Chosen reserve

Losses receive no assumed tax benefit.

Reserve = max(0, surplus) × entered percentage

Updated: September 2026

Example Scenarios

$2,400 receipts, $100 refunds, $150 fees, $450 costs, 25% reserve and 30 hours.

→ $1,700 operating surplus, $425 reserve and $1,275 remaining; $42.50 per hour after reserve.

Keep the example costs but reduce receipts to $500.

→ −$200 operating surplus; zero percentage reserve; the loss remains −$200.

FAQ

No. You enter a reserve percentage. It applies only to positive cash operating surplus and does not determine income or self-employment tax.

The loss remains negative and the percentage reserve is zero. No tax refund is invented.

It is a cash operating snapshot. Financing, owner transfers, capital purchases, accrual adjustments and noncash deductions require separate treatment.

Include service or production work, preparation, business travel, waiting and administration. Zero hours leaves hourly results unavailable.

Choose Save business case for local history. Copy MD includes inputs and notes; Download CSV contains the result breakdown. Keep a portable copy separately.

About Side Hustle Profit and Reserve Calculator

Use one month of receipts, refunds, fees, cash operating costs and all business hours. Choose a reserve for planning and compare it with a separate annual tax projection.