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

# Overview

Once you have onboarded one of your customers to Layer by creating a [Business](/api-reference/business/business), you can start importing their financial data. The more complete the data you send, the more accurate your customers' books, reports, and reconciliations will be.

Layer supports several types of financial data:

| Data type                                          | What it covers                                                     | How it's imported                                         |
| -------------------------------------------------- | ------------------------------------------------------------------ | --------------------------------------------------------- |
| [Bank data](/guides/importing-bank-data)           | Bank account and credit card activity                              | Plaid, or directly from your platform's embedded accounts |
| [Sales / AR data](/guides/importing-sales-ar-data) | Invoices, payments, and payouts (accounts receivable)              | Invoice & Payout APIs                                     |
| [Bill / AP data](/guides/importing-bill-ap-data)   | Vendor bills and the payments made against them (accounts payable) | Bill API                                                  |
| [Payroll data](/guides/importing-payroll-data)     | Wages, taxes, and related payroll activity                         | Check Payroll integration                                 |
| [Loan data](/guides/importing-loan-data)           | Loans, lines of credit, and their repayments                       | Custom accounts & categorization                          |

For a complete accounting picture, most platforms import **bank data** and **sales / AR data** at a minimum. **Bill / AP**, **payroll**, and **loan** data add further detail depending on your customers' needs.

<Note>
  Bill / AP, payroll, and loan support may need to be enabled for your platform. Reach out to your Layer contact for access.
</Note>