For bookkeepers & accounting professionals

A second pair of eyes
across every client book. A second pair of eyes across every client book.

Invoice Guard HQ finds duplicate charges, FX conversion errors, vendor price spikes, and billing anomalies before they cost your clients money, with plain-English findings ready to share directly.

Duplicate charges FX mismatches Vendor price spikes Guard Score per client

One scan, six checks, every finding explained from the client's actual data.

Scan a client file free See a sample report

No account, no setup, results in under 90 seconds.

Multi-client review

3 client books · 4 issues

Active
18Clients monitored
4Issues this week
$4,190Exposure flagged
Duplicate · Acme Corp Stripe + PayPal overlap $917.09 billed twice across providers
FX mismatch · Bright Labs EUR/USD conversion gap Invoice off by $128 at current rate
Under 90 sec Full scan from CSV upload to findings
No CSV rows stored Client data stays in your browser tab
Plain-English findings Paste directly into a client email
Multi-client dashboard Every Guard Score in one place

Six checks. Every scan. Every client book.

These errors look fine in a spreadsheet. That's why they survive manual review.

Duplicate invoice detection

Same vendor, same amount, billed twice across Stripe, PayPal, or a re-entry after a failed payment. Every match is scored and explained, with the exact two invoices and where each came from.

FX conversion errors

Multi-currency invoices where the domestic and foreign amounts don't reconcile at current rates. The specific gap shown in real money, not a generic warning.

Billing anomalies & price spikes

A subscription arriving 13 days early. A vendor who normally bills £2,200 suddenly invoicing £50,000. Velocity and round-number checks catch both before your client approves payment.

Client-safe by design

Client data never leaves your browser during a pre-scan.

The free CSV scan runs entirely in your browser tab. Nothing uploaded, nothing stored. Every connected provider uses TLS encryption and read-only access.

How connections work Run a free scan

Works with your existing exports

No integration required to start

Stripe CSV, PayPal CSV, QuickBooks export, manual spreadsheets, if it has invoice rows, Invoice Guard HQ can scan it.

Safe to use with client data

What Invoice Guard HQ never does.

Never needs provider passwordsUse CSV exports or restricted read-only access. No admin credentials required.
Never touches paymentsInvoice Guard HQ reviews invoices. It does not approve payments, issue refunds, or move funds.
Never stores CSV rowsThe browser pre-scan keeps every invoice row in the tab, nothing leaves your machine.

Simple pricing. Built for client workflows.

Start free on any client file. Upgrade when the workflow earns it.

Free

$0

Upload any client CSV and get a full findings report. Runs in your browser, no account needed.

Catch one billing error and it's already paid for itself.

Run Free Scan Now

Agency

$99/month

Multi-client dashboard. Manage all your clients in one place, full duplicate detection, anomaly checks, FX mismatch detection, and Guard Score for every book.

One caught billing error on one client file covers the month.

Start Agency Plan

Guided setup

Let's talk

Larger firm or complex multi-entity setup? Get a guided walkthrough tailored to your specific books.

Worth it when you manage more than 10 client accounts.

Talk to the team

Security First. Always.

  • CSV pre-scans run entirely in your browser, invoice rows never leave your tab
  • TLS encryption on every connection to and from Invoice Guard HQ
  • No credentials stored beyond what provider access requires
  • You remain in full control at every step

Our data handling practices follow FTC guidance on protecting personal information and the FTC Safeguards Rule.

Start with one client file. Right now.

Run a Free Client Scan

No account, no setup, under 90 seconds.
Invoice Guard HQ, a second pair of eyes on every client book.