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Billing Pro Rated Calculation

A billing pro-ration calculation block for React and Next.js that shows credit adjustments and new plan costs for mid-cycle upgrades using shadcn/ui and NumberFlow.

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Transparently explain billing changes to your users with this pro-rated calculation block for React and Next.js. Features automated credit calculations for unused time, immediate payment totals, and future billing cycle previews. Built with TypeScript, @number-flow/react for animated price transitions, Framer Motion for staggered layouts, and shadcn/ui components. Perfect for subscription upgrade flows, plan switching modals, and billing transparency screens.

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Last updated on June 1, 2026

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