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

# How contracts power invoice AI review

> Why an accurate, complete contract lets the AI invoice review catch overcharges.

LiftAI's AI invoice review doesn't judge an invoice in a vacuum — it compares each invoice against the property's **contract**. The more accurate and complete that contract is, the more overcharges the review can catch. This article explains the connection so you know what to keep up to date.

<Note>
  The AI invoice review is rolled out gradually and depends on the contract having structured pricing. If the review can't run for an invoice, see [Why isn't AI invoice review available?](/invoices/ai-review-availability).
</Note>

## What the review reads from the contract

When the AI reviews an invoice, it draws on the contract's:

* **Pricing** — the monthly price and the **rate sets** (hourly rates for billed labor). Without structured pricing, there's nothing concrete to compare line items against, and the review can't run.
* **Review rules** — what the contract says is **included**, **excluded**, a **miscellaneous charge**, or otherwise worth flagging. These let the review tell a covered service apart from one that shouldn't be billed separately.
* **Terms** — such as escalation caps and parts-and-materials markup, which the review uses to check whether amounts are within the contract.

Where the review relies on the contract, its findings cite the specific clause — so an accurate contract also makes each finding checkable. See [Understand the AI invoice review](/invoices/ai-invoice-review).

<h2 id="suggest-rules-from-a-disagreement">
  Turn a disagreement into a review rule
</h2>

When you finalize an invoice decision that differs from Lift AI's recommendation — you reject a charge it approved, or approve one it flagged — the Lift AI assistant can turn that disagreement into a review rule on the contract, so the next review gets it right.

After you submit your decision, a prompt offers to suggest rules. It opens the assistant with the context of your decision (and may first ask what the AI got wrong, when that isn't already captured on the invoice), then proposes one or more rules — each named and categorized as an included service, excluded service, and so on. Add the ones you want to the contract with a single click.

The assistant only **adds** rules: it never edits or deletes existing ones, and it points out any existing rule that conflicts with your decision so you can review it yourself. If your decision actually agrees with Lift AI, it says so and suggests nothing. This is a consultant feature and needs the Lift AI assistant enabled for your account.

## Why completeness matters

A thin or out-of-date contract limits what the review can find:

* **Missing pricing** means the review can't run at all for that property's invoices.
* **Missing or wrong review rules** mean the review has no basis to flag a charge that the contract actually excludes — so an overcharge can slip through.
* **Stale rates or terms** can make legitimate charges look wrong, or wrong charges look fine.

## Keep contracts review-ready

<Steps>
  <Step title="Check eligibility">
    Open the contract and look at the **AI Extraction** card on the Overview tab. The **Invoice review eligible** chip tells you whether the contract is ready. See [View contract details](/contracts/view-a-contract).
  </Step>

  <Step title="Fill in pricing and rules">
    Make sure the contract has its pricing (a monthly price and/or rate sets) and its review rules. See [Edit a contract](/contracts/edit-a-contract).
  </Step>

  <Step title="Keep it current">
    Update rates, terms, and rules whenever the contract changes, so the review always compares against today's terms.
  </Step>
</Steps>

## Related

* [Understand the AI invoice review](/invoices/ai-invoice-review)
* [Why isn't AI invoice review available?](/invoices/ai-review-availability)
* [View contract details](/contracts/view-a-contract)
* [Edit a contract](/contracts/edit-a-contract)