You can buy additional credit packs at any time once you have used your monthly quota — no need to wait for the next billing cycle or upgrade your plan mid-month.
Your options:
- Top up with a one-off pack when a campaign runs bigger than expected
- Move up a plan if the higher volume is going to be the new normal — the cost per credit drops at every tier
- Switch to PayGo if your volume is genuinely unpredictable month to month
Unused credits on a monthly plan roll over, so buying a slightly larger plan than you need in a quiet month is not wasted.
Not sure which is cheaper for your volume? The pricing page sets both models out side by side.