SMS Billing

The SMS Billing section provides detailed information on how SMS message costs are calculated, depending on the number of characters and the type of characters used.

SMS Message Billing Rules

The length of a single SMS message depends on the character set:

• GSM-7 – standard SMS character set (Latin alphabet letters, numbers, basic punctuation). A single message can contain up to 160 characters.

• Unicode – a message containing even one character from outside GSM-7 (e.g., emojis, diacritical marks) is automatically treated as Unicode, which reduces its maximum length to 70 characters.

SMS Billing for GSM-7 Characters

Number of Characters	Number of SMS Messages
1 - 160	1
161 - 306	2
307 - 459	3
460 - 612	4
613 - 765	5
766 - 918	6
919 - 1071	7
1072 - 1224	8
1225 - 1377	9

SMS Billing for Unicode Characters

Number of Characters	Number of SMS Messages
1 - 70	1
71 - 134	2
135 - 201	3
202 - 268	4
269 - 335	5
336 - 402	6
403 - 469	7
470 - 536	8
537 - 603	9

Important Information

• If a message contains special characters (e.g., diacritical, emojis), their use is automatically detected and displayed in the SMS campaign editor.

• Content personalization (e.g., recipient names) can lengthen the SMS and increase the number of units in the billing – this should be taken into account when planning messages.

• Cost optimization – to avoid unexpected charges, it is worth checking whether the message contains characters outside GSM-7. You can use available SMS analysis tools or our SMS campaign editor for this purpose.