Check contracted AWS Marketplace capacity before billing SaaS overages

Identify whether the product uses usage subscriptions, contracts or a contract with additional consumption. AWS's metering guidance distinguishes reporting all usage for SaaS subscriptions from reporting usage beyond contractual entitlements for SaaS contracts. The finance review must therefore start with the actual offer and product model rather than reuse one calculation across every marketplace customer.

Retain the offer, agreement and relevant dimension definitions. Translate the commercial unit into a readable description: users, stored capacity, processed requests or another agreed measure. Have the product owner explain any conversion between that unit and the raw telemetry so finance can test the quantity being billed.

AWS provides an Entitlement Service for SaaS contract products. Its documentation describes checking the customer's capacity and returning an expiration date associated with the entitlement. Ask engineering to provide a reviewable history of the entitlement relevant to the billing period, including changes and renewals.

A current entitlement snapshot may be insufficient when capacity changed during the month. Record the effective dates, customer or agreement identifiers and dimensions. If several agreements exist for one product, preserve the association of usage with the intended agreement. Finance needs to understand the commercial mapping without being asked to infer it from a collection of raw API responses.

Reconcile total measured usage to the amount covered by the agreement and the remaining chargeable excess under its rules. Confirm whether capacity resets, carries forward or applies to a particular interval; use the offer's terms and supported implementation. Avoid subtracting a monthly allowance from each hourly record or otherwise applying the same entitlement repeatedly.

For a simplified hypothetical agreement covering 10,000 qualifying units in a period, observed usage of 12,400 would leave 2,400 units above the allowance if that is how the contract measures excess. The example assumes one dimension and no midperiod change. A real calculation should preserve any additional rules rather than force a more complex offer into that simple subtraction.

Compare the approved billable quantity with the metering submissions and their outcomes. Identify rejected, duplicate or missing records and keep their resolution visible. AWS states that it calculates customer charges from the metering records and prices supplied by the seller. A complete internal usage table does not establish that the marketplace received the intended billable quantity.

Review any closing-period or cancellation event with engineering because submission timing can affect what can be billed. Use current product documentation for the applicable process. If a quantity is wrong, follow the supported correction and customer-resolution route instead of sending an unreviewed compensating record that may create a second error.

Compare the resulting bill or seller report with the entitlement and usage workpaper. Check dimensions, quantities, prices and period. Investigate differences before the customer has to raise them. Retain the technical submission references alongside the readable calculation so both finance and engineering can reproduce the result.

Make entitlement changes part of billing review and assign ownership for exceptions between contract, product and marketplace data. The ongoing control should show what the customer bought, what it used and what excess was actually reported. That evidence supports both customer explanations and the accountant's separate assessment of the resulting revenue and balances.