Different credit sources carry different validity, and the spend order is built so the shortest-lived batch always goes first.
- Monthly plan credits - valid for the billing cycle they were granted in. They do not roll over into the next month.
- Annual plan credits - the full twelve months are granted upfront and are valid across the whole term, not metered per month. This is why annual suits uneven campaign rhythms.
- Pay-as-you-go packs - valid 365 days from purchase, not tied to a billing cycle, and not consumed by a plan renewal.
- The free start - the one-time 100 credits behave like any other balance once granted.
- Legacy check balances - checks bought or granted before 2026-09-19 never expire and are used before credits when you verify a list.
Expired batches are zeroed automatically rather than lingering in a balance you cannot spend, so what the app shows is always what you can actually use.
Practical consequence: if a month is going to be quiet, buy nothing extra and let the plan credits do their job. If a month is going to be heavy, an annual plan or a bigger pack is better than repeated small top-ups, because both cost less per credit.
Cancelling stops future grants but does not shorten the validity of credits already granted for the paid term.