The short answer: add up the notices you send each month and multiply by the parts in each: that is the number of credits. Notices use the same credits as any SMS, with no bundles and no monthly fee, and the tier price applies to the whole purchase. To avoid running dry halfway, watch the balance through the API or in My MozOut.
Doing the maths
| 1 |
Count your notices per month: reminders, confirmations, alerts. An honest estimate is enough.
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| 2 |
Check the parts in each notice. Up to 160 plain characters is 1 part; with letters such as "ã" or "ç", 1 part holds up to 70. Keep notices to one part whenever you can.
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| 3 |
Multiply: notices per month times parts per notice gives credits per month.
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| 4 |
Find the tier in the table. The minimum purchase is 1,000 credits.
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| Credits bought |
Price per SMS |
| Up to 1,000 |
$0.0167 |
| 1,001 to 5,000 |
$0.0150 |
| 5,001 to 10,000 |
$0.0142 |
| 10,001 to 25,000 |
$0.0125 |
| 25,001 to 50,000 |
$0.0117 |
| 50,001 to 100,000 |
$0.0100 |
| Over 100,000 |
$0.0092 |
Buying several months at once can move the purchase into a better tier. For example, 3,000 credits are all charged at the 1,001 to 5,000 price, $0.0150 each. And note: 10,000 credits are charged at $0.0142 each, but 10,001 credits at $0.0125 each, so the larger order costs less in total. If you are unsure how long credits stay in the balance, see whether SMS credits expire.
Never running out of credits
| What to watch |
Where |
| Credit balance |
GET /v1/sms/balance, or the SMS page in My MozOut |
| Credits set aside for scheduled notices |
The scheduled_credits field of the same call |
| Daily limit and what went out today |
The daily_limit and sent_today fields |
A daily routine in your system can check the balance and alert you when it drops below what you use in a week. Always subtract scheduled_credits: those credits are still in the balance, but already spoken for.
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No balance, no notices. A scheduled notice that reaches its time without credits ends up failed with insufficient_credits, and in a batch the remaining messages are refused. Credits reach the balance once payment is in, and some payment methods are confirmed by hand: buy with room to spare.
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Credits for a notice that fails go back to the balance, and those for a scheduled notice are only taken when it is sent. Cancel in time and you pay nothing. More in SMS credits and price tiers.
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Want to know what a month of notices costs you? See the SMS prices and the calculator.
See SMS prices
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