When you have used 80% of your monthly tokens of a subscription, you will be notified via email. Once you have used up all tokens, no further measurements are possible until next month (except for preview measurements on 3D Measure Up which are always free). Should you need more tokens, you can either upgrade your plan or purchase a pay as you go package.
There are no overage charges.
If you want to make sure you never run out of tokens:
If you run out of tokens, we never charge overage fees. Instead, no further API calls or image downloads are possible (except preview images on 3dmeasureup.com, which are always free on our website).
If you want to make sure that this never happens, there are 3 ways:
Pick a plan that has slightly more tokens than you expect. If you don’t use them, they roll over to the next month anyway.
Upgrade when you notice that you are running low on tokens (e.g. when you receive a notification email at 80% of your budget) and downgrade when you don’t use your monthly budget and start to collect more and more rollover tokens.
Have some Pay-as-you-go tokens as a backup. They are only used when all of your subscription tokens have been used before (in which case you receive another notification via email).