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Telephony Credits

Contents

Overview

Duo's main authentication methods — Duo Push and Duo Mobile-generated passcodes — are app-based and have no telephony cost, but require a smartphone or other mobile device. Duo also supports telephony-based authentication via phone calls and SMS messages. Each authentication call or SMS message is debited against your telephony credit balance (as per rate card).

If you ever exhaust your telephony credit balance, your users will not be able to receive authentication phone calls or text messages. They will still be able to authenticate using non-telephony methods: Duo Push, Duo Mobile passcodes, and hardware tokens.

Paid accounts are issued credits monthly, and may purchase extra telephony credits as needed. Duo Free account holders can also purchase additional telephony credits.

Types of Telephony Credits

There are two types of telephony credits: allowance credits and backup credits. All account holders — even those using free accounts — can purchase backup credits, but only paid accounts are issued monthly allowance credits.

  • Allowance credits are refilled automatically every month for all paid accounts. Duo Beyond, Duo Access, and Duo MFA plan accounts with automatic billing receive 100 credits per user each month for the first 500 users. For example, a customer subscribing to the "Up to 30 users" Duo MFA plan will receive 3,000 Allowance Credits per month. Unused allowance credits do not roll over to the next month. Duo Free plans do not receive any monthly allowance credits.

    Invoiced customers (typically those with more than 2,500 users) choose the amount and frequency of allowance credit refills.

    For additional information on telephony credits in Duo's paid plans, please contact us.

  • Backup credits are used if you run out of allowance credits in a given month. Purchase backup credits at any time with a 1,000 credit minimum. A batch of 1,000 credits costs $10. All Duo editions are able to purchase backup credits. Backup credits do not expire, and the unused balance carries forward to the next month. Backup credits are used only when no allowance credits are available.

Monitoring and Purchasing Credits

Duo automatically notifies all account administrators when the credit balance falls below a pre-determined percentage of your total credits. You can configure the low-credit alert and set the maximum credits per user authentication in your account's Settings.

Role required: Owner or Billing.

You can check your balances for both types of credits and purchase backup credits using the Telephony Credits page. Here's how:

  1. Log in to the Duo Admin Panel and click Billing in the left sidebar, and then click Telephony Credits in the submenu.

  2. The Telephony Credits page shows your available allowance and backup telephony credits.

    Telephony Credit Summary

    For a detailed view of the calls and SMS messages that have debited your account, click the Telephony Logs button in the upper right corner.

  3. To purchase backup credits, enter the number of credits you wish to buy (minimum 1,000) in the "Credits to add" box. The total cost of the credits is calculated and displayed. Click the Purchase Credits button to finish.

    Purchase Telephony Credits

A valid credit card must be associated with your account to purchase backup telephony credits. Click Billing then Payment Info in the Duo Admin Panel to add your card information.

You can also access the Telephony Log from the Duo Admin Panel Dashboard:

  1. Log in to the Duo Admin Panel and click Reports in the left sidebar. Click Telephony Log in the Reports submenu.

  2. The Telephony Log page lists SMS and phone events with the associated phone number and telephony credit usage for that event. The log also includes each event's context, or the type of action that triggered the telephony usage. For example, "Authentication" is an end user requesting SMS passcodes or a phone call verification during Duo two-factor login.

Rate Card

Text messages to the US/Canada cost 1 credit each and phone calls to the US/Canada cost 2 credits each. See the table below for credit charges to other countries.

  • Cells marked "N/A" are not supported at this time.
  • Cells with multiple values (like "10 / 20") mean that cost depends on the type of phone. For example, calling mobile phones is generally more expensive than calling landlines.
  • Some countries have phone numbers that are prohibitively expensive (certain mobile carriers, satellite phones, etc.). These numbers are not supported at this time.
  • By default, users may not use more than 20 credits for a single phone call or SMS. The maximum credits per action can be changed from the Duo Admin Panel in the “Phone Calls” section on the Settings page.

Note: This rate card is provided as a general guide to telephony costs. Certain individual phone numbers may in fact be more expensive.

Country Phone Call SMS Message
Afghanistan 50 5
Albania 20 / 50 5
Algeria 10 / 20 / 30 10
American Samoa 20 10
Andorra 10 / 50 5
Angola 30 / 40 5
Anguilla 20 / 40 / 150 5
Antigua and Barbuda 20 5
Argentina 5 / 30 10
Armenia 20 / 40 10
Aruba 20 / 30 / 40 10
Australia 5 / 20 5
Austria 5 / 20 / 50 10
Azerbaijan 40 10
Bahamas 10 / 150 5
Bahrain 30 / 40 / 150 5
Bangladesh 10 20
Barbados 20 / 30 / 40 5
Belarus 50 10
Belgium 5 / 20 10
Belize 40 / 50 5
Benin 40 5
Bermuda 20 / 150 5
Bhutan 30 10
Bolivia 20 / 30 10
Bosnia and Herzegovina 20 / 60 5
Botswana 20 / 40 10
Brazil 5 / 30 10
Brunei 10 5
Bulgaria 10 / 60 / 70 20
Burkina Faso 40 5
Burundi 40 10
Cambodia 20 5
Cameroon 30 / 40 5
Canada 2 / 30 / 150 1
Canary Islands 5 N/A
Cape Verde 50 5
Cayman Islands 20 / 30 / 150 5
Central African Republic N/A 5
Chad 50 5
Chile 5 / 20 / 40 10
China 5 10
Colombia 10 / 20 10
Comoros 90 10
Congo 40 10
Cook Islands N/A 5
Costa Rica 10 10
Cote D'Ivoire N/A 10
Croatia 10 / 40 5
Cuba N/A 5
Cyprus 10 20
Czech Republic 10 / 40 10
Denmark 5 / 20 5
Djibouti 60 5
Dominica 40 / 150 5
Dominican Republic 10 / 20 / 30 / 150 5
Ecuador 20 / 40 10
Egypt 30 5
El Salvador 40 5
Equatorial Guinea 40 5
Eritrea 60 5
Estonia 10 / 60 / 90 10
Ethiopia 40 / 50 5
Faroe Islands 40 5
Fiji 60 5
Finland 10 / 20 10
France 5 / 20 10
French Guiana 20 / 60 10
French Polynesia 50 20
Gabon 30 / 40 5
Gambia 70 5
Georgia 10 / 30 10
Germany 5 / 20 / 30 10
Ghana 20 / 40 5
Gibraltar 20 / 40 / 50 5
Greece 5 / 30 10
Greenland 90 5
Grenada 20 / 30 / 40 / 150 5
Guadeloupe 20 / 50 20
Guam 10 20
Guatemala 30 10
Guinea 40 5
Guinea-Bissau N/A 5
Guyana 40 10
Haiti 30 / 40 10
Honduras 20 / 40 10
Hong Kong 5 5
Hungary 5 / 30 10
Iceland 10 / 40 / 50 5
India 5 5
Indonesia 10 / 20 5
Iran 30 5
Iraq 20 / 30 5
Ireland 5 / 20 / 30 10
Israel 5 / 20 / 50 10
Italy 5 / 20 / 30 / 40 10
Jamaica 20 / 30 / 40 / 150 5
Japan 5 / 30 10
Jersey N/A 5
Jordan 10 / 20 10
Kazakhstan N/A 10
Kenya 20 / 30 5
Kiribati N/A 5
Korea 5 / 20 10
Kuwait 20 5
Kyrgyzstan 20 5
Laos 20 5
Latvia 10 / 40 / 60 10
Lebanon 20 / 30 5
Lesotho 60 10
Liberia 50 10
Libya 50 5
Liechtenstein 10 / 130 5
Lithuania 20 / 40 / 90 5
Luxembourg 5 / 40 5
Macau 10 5
Macedonia 20 / 50 5
Madagascar 50 5
Malawi 30 5
Malaysia 5 / 10 5
Maldives 40 5
Mali 30 / 40 5
Malta 20 / 50 5
Martinique 20 / 60 / 80 20
Mauritania 40 5
Mauritius 30 5
Mexico 5 / 10 / 20 5
Micronesia 40 5
Moldova 30 / 40 10
Monaco 10 / 50 5
Mongolia 30 5
Montenegro 30 / 50 5
Montserrat 30 / 150 5
Morocco N/A 5
Mozambique 30 / 40 5
Namibia 20 / 50 5
Nauru N/A 5
Nepal 30 / 40 5
Netherlands 5 / 10 10
Netherlands Antilles 20 / 30 10
New Caledonia 50 5
New Zealand 10 10
Nicaragua 30 / 40 5
Niger 30 5
Nigeria 20 / 30 5
Northern Mariana Islands 20 / 130 N/A
Norway 5 / 30 / 40 10
Oman 30 5
Pakistan 30 5
Palestinian Territory 50 10
Panama 5 / 10 / 20 10
Papua New Guinea N/A 5
Paraguay 20 / 40 5
Peru 5 / 10 / 20 / 40 5
Philippines 30 5
Poland 5 / 30 5
Portugal 5 / 20 10
Puerto Rico 5 5
Qatar 40 5
R\xE9union Island 50 / 60 20
Republic Of The Congo N/A 10
Romania 10 / 30 / 50 10
Russia 5 / 20 / 30 5
Rwanda 20 / 30 5
Saint Kitts and Nevis N/A 5
Saint Lucia N/A 5
Saint Pierre and Miquelon N/A 10
Saint Vincent N/A 5
Samoa 70 5
San Marino 10 10
Sao Tome and Principe N/A 10
Saudi Arabia 20 / 30 5
Senegal 30 / 40 10
Serbia 20 / 40 / 50 5
Seychelles 30 10
Sierra Leone 70 10
Singapore 5 5
Slovakia 10 / 40 10
Slovenia 10 / 50 / 60 5
Solomon Islands N/A 5
Somalia 80 10
South Africa 10 / 30 10
South Sudan N/A 5
Spain 5 / 20 10
Sri Lanka 30 5
Sudan 30 5
Suriname 40 5
Swaziland 20 / 40 5
Sweden 5 / 10 10
Switzerland 5 / 20 / 40 / 70 5
Syria 40 5
Taiwan 5 / 20 5
Tajikistan 30 5
Tanzania 30 5
Thailand 5 5
Timor-Leste N/A 10
Togo 60 5
Tonga 60 5
Trinidad and Tobago 30 / 150 5
Tunisia 40 / 70 5
Turkey 10 / 30 5
Turkmenistan 40 10
Turks and Caicos Islands 40 / 150 5
Uganda 30 5
Ukraine 20 / 30 10
United Arab Emirates 30 5
United Kingdom 5 / 30 / 40 5
United States 2 / 5 / 40 / 130 / 230 1
Uruguay 20 / 40 10
Uzbekistan 20 10
Vanuatu N/A 20
Vatican City 5 N/A
Venezuela 5 / 10 / 30 10
Vietnam 10 / 20 5
Virgin Islands 5 5
Yemen 30 5
Zambia 20 / 40 5
Zimbabwe 20 / 60 / 80 5

Troubleshooting

Need some help? Try searching our Knowledge Base articles or Community discussions. For further assistance, contact Support.

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