> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tillbiz.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Customers

> Keep a customer directory, link sales to customers, and build purchase history.

The **Customers** directory keeps a record of the people who buy from you. Linking
sales to customers builds a purchase history and lets you send receipts and
[invoices](/guides/sales-customers/invoices).

## Add a customer

<Steps>
  <Step title="Open Customers">
    Select **Customers** from the sidebar.
  </Step>

  <Step title="Add a new customer">
    Click **New customer** and enter their name, phone, email, and address.
  </Step>

  <Step title="Save">
    The customer can now be attached to orders and invoices.
  </Step>
</Steps>

## Link a customer to a sale

While [taking an order](/guides/point-of-sale/taking-orders), attach a customer to
record the sale against them. Over time this builds their purchase history, which
you can review in the [customer reports](/guides/reports/reports-overview).

## Customer portal

Customers can have their own self-service [portal](/guides/billing-addons/customer-portal)
to view and pay invoices online — no TillBiz account needed.

<Tip>
  Capturing a phone number lets you send M-Pesa requests and digital receipts, and
  makes the customer easy to find again at the till.
</Tip>