# Bill a contract

Split the contract's amount into instalments, each invoiced on its date, per consultation or at a project milestone, let the system draft the invoices, or invoice one line at once.

The **Auto Invoicing** tab of a contract lists its instalments. Each line says what triggers its invoice and how much it bills; the system turns the due lines into draft invoices for the billing team.

## Before you start {#before-you-start}

- You need the **User: Own Documents** level or higher on **Contracts**, and invoicing rights in Accounting as well as your access to contracts.
- The contract is **Valid**: only valid contracts are invoiced.

## Add the instalments {#add-instalments}

1. Open the contract and its **Auto Invoicing** tab, then click **Add a line**.
2. Choose the **Trigger**:
   - **Date** invoices the line on its **Due Date**;
   - **Consulting**, on a consultation contract, invoices each consultation linked to the contract;
   - **On Progress**, on a project contract, invoices the line once the project reaches the **Project Progress Threshold**.
3. Type the **Amount**. The **Service Product** comes from the contract settings. The lines together cannot exceed the contract's amount.

![Three quarterly instalments by date; the first one is already due.](https://jaah.app/web/image/8271-ce2827fb/law-contract-billing-contract_instalments-en.png)

## Invoice {#invoice}

Every hour, the system creates a draft invoice for each line whose trigger is met, and the line becomes **Invoiced**. To invoice a line at once, click its **Generate Now** button.

![The first instalment is invoiced; the Invoices button opens the draft invoice.](https://jaah.app/web/image/8275-04982f93/law-contract-billing-contract_invoiced-en.png)

The **Invoices** button of the contract opens its invoices, to check and confirm. On a phone, the button sits behind the lightning button at the top.

## FAQ {#faq}

### Generate Now refuses an On Progress line. {#progress-not-reached}

The project has not reached the line's threshold yet. Update the progress of the contract, or wait until the project gets there.

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- Source: https://jaah.app/docs/law-contract/bill-a-contract
- Updated: 2026-10-14
- Version: Contracts 19.0.1.0.26
- Verified: 2026-10-14