> For the complete documentation index, see [llms.txt](https://docs.cekat.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cekat.ai/en/additional-information/billing.md).

# Billing

### **Free and subscription plans**

When a user first signs up for Cekat, their account starts on the **Free** plan. The Free plan has a lot of limits, though, and can't connect a WhatsApp number. To unlock WhatsApp number connection and get higher limits, users can subscribe to one of the available plans.

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### **Monthly Active Users (MAU)**

**Monthly Active Users (MAU)** is the number of unique customers who send you an incoming chat (counted across all your connected platforms) in a month. The word **unique** really matters here: if one customer chats every day, they still count as just 1 MAU.

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### **AI Responses**

**AI Responses** is the number of replies the AI gives. For example, if a customer asks about a product's price and the AI explains it, that counts as 1 AI response, however long the reply is. That said, a single AI reply can use more than 1 AI response if its behavior or knowledge is very long. Every plan comes with an AI response quota. If that's not enough, you can add more by clicking **Top Up AI Responses** (on the far right).

* **Top-up pricing:**
  * Rp 40 per AI response.
  * Top-ups can only be bought in multiples of 5,000 AI responses.

When you're using top-up responses, each AI reply deducts 1 AI response (more if the behavior or knowledge is very long) until your **Additional AI Responses** reach 0.

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### **Monthly refresh**

Because plans are monthly subscriptions, all of these limits refresh every month. For example, if you reach 800 monthly active users and 4,500 AI responses in a month, both MAU and AI responses go back to 0 at the start of the next month (as long as you're still subscribed). Any **Additional AI Responses** you've topped up never expire and aren't affected by the refresh.

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### How to upgrade your plan

If you want to upgrade partway through the month, go to Billing and click **Buy Now** on the plan you want. The price is adjusted automatically based on your usage and previous plan (pro-rated).

**Example:**

* User A is on the Pro plan and is one week into it.
* If User A wants to upgrade to the Business plan (1 month), they can go straight to the billing page and buy it.
* The Business plan price on User A's dashboard will already be adjusted: the price of one month of Business minus the price of one week of Pro (since one week has already passed).
* The plan switches to Business and runs for one month.