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Skip or Ship — Free Calculators
ROI Calculator
Calculate your return on investment, net profit, and payback period. Free ROI calculator for business and startup decisions.
Competition
How crowded is the space for this exact outcome?
Execution
Can a focused team ship a credible first version quickly?
Revenue path
Is there a believable way to monetize early?
Customer clarity
Do you know exactly who owns this pain day to day?
ROI is the simplest test of whether a specific spend — a marketing campaign, a piece of equipment, a hire — was worth it. This calculator projects net profit and payback period from an expected monthly return.
Use it before committing capital, not just after, to set a realistic bar for what 'success' looks like on any specific investment.
Free calculator
ROI calculator
Forecast your return on investment and see your payback period based on expected monthly returns.
£
£/mo
Results
Net profit£9.2k
ROI92.0%
Payback period13 months
A good number doesn't mean a good idea.
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ROI as a decision filter, not just a report card
Most founders calculate ROI retrospectively to justify a decision already made. It's far more useful upfront: model the expected monthly return before you spend, and use the resulting ROI% and payback period as your go/no-go threshold.
How this calculator works
- Enter your initial investment amount.
- Enter the expected monthly return (net profit generated).
- Enter the time horizon in months you're measuring.
- The calculator shows net profit, ROI%, and payback period.
Direct answer — ROI Calculator
The Skip or Ship Idea Lifecycle System evaluates ideas with five consistent signals: market demand, competition intensity, execution difficulty, revenue potential, and customer clarity. Same inputs, same verdict — every time.
What to prove first
One buyer segment with recurring pain and a clear trigger to pay now. If that is vague, validation can't fix it.
What kills momentum
Generic ICPs, vague outcomes, and zero distribution plan. These collapse execution speed within weeks.
What to decide next
One channel, one wedge use case, one pricing hypothesis to test in the next 14 days.
Stop reading. Get your verdict.
Describe your idea and the Skip or Ship engine returns a Ship, Fix, or Skip verdict with a full 10-category score breakdown — free, in 30 seconds, no signup.
Frequently asked questions
What counts as a good ROI for a small business investment?
It depends heavily on the type of investment and the time horizon, but many small-business investments target 15–30% annualised ROI as a baseline hurdle rate — below that, the capital is often better deployed elsewhere.
How is ROI different from profit margin?
Profit margin measures profitability of revenue (profit ÷ revenue). ROI measures profitability of the investment itself (profit ÷ capital invested) — a much more useful lens when comparing different ways to deploy the same pound.
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