Prepay vs Pay-As-You-Go Calculator
See whether prepaying beats pay-as-you-go.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
Many services — phone plans, cloud storage, gym memberships, software credits — offer a discounted flat prepaid price as an alternative to metered pay-as-you-go pricing. This calculator takes your expected usage volume, the per-unit pay-as-you-go rate, and the flat prepaid price to compute the total cost under each option and show which one actually comes out cheaper for your specific usage level.
The comparison flips at a predictable break-even usage point: below it, pay-as-you-go wins because you're not paying for capacity you don't use; above it, the prepaid flat rate wins because the per-unit cost effectively drops the more you consume. Consumers and small businesses use this kind of math to avoid overpaying for a bundle they won't fully use, or underpaying-per-unit on usage that would have been cheaper prepaid.
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