Pricing

Pay for one invoice, or check them all.

Every invoice, checked against what you were quoted - with the evidence attached. Fuel auditing is included on every paid plan; the plans differ by how many invoices you check, not by what we check.

Single Audit

$9.99one-time

One invoice, checked properly.

One completed audit
Multiple supporting documents
Evidence-backed findings
Dollar-impact calculation
Downloadable report
Editable response email
Documents retained per retention policy

Start a single audit

Small Business

$39.99per month

Up to 50 invoices checked each month.

Up to 50 invoices checked per billing period
Full fuel auditing on every invoice
Audit history
Downloadable reports
Response emails
CSV export
Priority processing
One business workspace

Choose Small Business

Gas Station Unlimited

Enterprise Unlimited

$499.99per month

For franchisors, fuel suppliers and distributors checking their own work.

Unlimited invoice uploads, subject to fair use See fair use
Everything in Gas Station Unlimited
Batch uploads and multi-invoice reconciliation
Team members and roles
Consolidated reports across locations
Highest priority processing
Larger document limits: 400 pages per audit, 200 files per drop
Spreadsheet export, search and filtering
Activity log and admin controls
API access and custom terms on request

Choose Enterprise Unlimited

Notes on billing

Checkout is not yet enabled. Choosing a plan creates your account and records the plan you selected; payment collection is being added in a later release.
Monthly plans can be cancelled at any time and remain active until the end of the paid period.
Single Audit credits do not expire while your account is open, and each credit covers one completed audit.
An invoice checked means one audit that ran. Supporting documents you attach - quotes, price notices, contracts, rate sheets, delivery tickets, bills of lading - do not count, and neither do vendor reference documents you store once. Re-running an audit does not count again.
Small Business includes up to 50 invoices per billing period. If you reach it, the invoice waits and you can move to Gas Station Unlimited or buy a single audit - nothing is charged automatically.
Gas Station Unlimited has no fixed allowance, subject to a fair-use ceiling of 600 invoices checked per month. Above that we contact you and review it with you. See the fair-use answer.

Common questions

What documents should I upload?: Always upload the invoice you are questioning. Then upload anything that states what the price or quantity should have been: a quote, contract, rate sheet, pricing notice, purchase order, delivery receipt, bill of lading, tax schedule or a prior invoice from the same vendor.
What if I only have the invoice?: You can still run an audit. Without supporting documents the analysis is limited to internal checks such as arithmetic, duplicated lines and quantity-versus-total consistency. Findings will be marked as needing more evidence where a comparison document is required.
Does Invoice Investigator tell me I was overcharged?: It tells you what your documents support and where the invoice differs, with the evidence and the dollar impact. Differences are labelled as verified, possible, likely, or insufficient evidence. Where a difference could have a legitimate explanation such as freight, margin or a tax change, that is stated instead of calling it an error.
How many invoices can I check on each plan?: Single Audit covers one invoice. Small Business includes up to 50 invoices checked per billing period. Gas Station Unlimited has no fixed allowance, subject to a fair-use ceiling of 600 invoices checked per month. Enterprise Unlimited has no fixed allowance, subject to a fair-use ceiling of 2,500 invoices checked per month. Supporting documents you attach to an invoice - quotes, price notices, contracts, rate sheets, delivery tickets, bills of lading - never count toward an allowance, and neither do vendor reference documents you store once. Re-running an audit does not count again. If you reach your allowance, the invoice waits and you can upgrade or buy a single audit; nothing is charged automatically and we contact you before restricting an account.
How long are my documents kept?: Uploaded invoices and supporting documents are deleted automatically 30 days after upload. You can delete them sooner from Documents & retention. Vendor reference documents are kept until you delete them. Audit results, findings and reports remain with your account until you delete them or close the account.

Investigate an Invoice Enterprise waitlist