# Proration Line Item Upgrade Recheck

Recheck prorated line items after a mid-cycle plan change before the invoice is trusted.

## Scope
Preparation and review only. No account action or professional decision.

## Inputs
Subscription change record, cycle dates and the generated proration lines.

## Workflow
1. Record the cycle start and the change date.
2. Recompute time-based credit and charge per line.
3. Match them against the generated proration lines.
4. Return the recheck without billing changes.

## Output contract
line | change_date | days_credit | days_charge | expected_amount | invoice_amount | match

## Fictional acceptance test
Fictional upgrade on day 10 of a 30-day cycle. Credit 20 unused days of the old 30 plan (20.00) and charge 20 remaining days of the new 60 plan (40.00): net 20.00. An invoice line of 40.00 without the credit would double count the remaining days.

## Review gates
Keep original values, source IDs and version dates. Unknown facts stay held. Use qualified review for hiring, legal and accounting conclusions. No send, share, sign-in, scheduling, ledger change or payment. Fictional contract review is not a live account compatibility test.

## Method source
https://docs.stripe.com/billing/subscriptions/prorations

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