Find the money your business is quietly losing. Margin Sentinel scans your bank and card transactions for duplicate charges, silent price increases, avoidable fees, and suspicious look-alike payees — then tells you, in plain English, what each one costs and what to do about it.
Start with the free leak scan
Upload 12 months of bank or card transactions as a CSV and get your full leak report in about two minutes. The scan runs entirely in your browser — your file is never uploaded, sent, or stored, and no account or bank login is needed. Free, with no credit card.
What we check
- Duplicate charges — the same vendor billing the same amount twice within days.
- Silent price increases — recurring bills that crept up without notice.
- Fees you can avoid — overdraft, late, service, and interest charges.
- Look-alike payees — new payees with names almost identical to vendors you trust, a common invoice-fraud trick.
- Every subscription — a full list of your recurring charges, so you can cut what you don’t use.
Margin Sentinel, the service
The free scan shows you one snapshot. The service keeps it going, by hand: each month you send your latest statement export – the same CSV the free scan reads. We run it, review every finding ourselves, and send you a short leak report with the fixes. The next month’s statement proves whether the savings actually landed. No bank login, no account connection – just the file you already know how to export.
- Essentials — $79/month. Ongoing leak monitoring, findings with fixes, and a weekly summary.
- Pro — $199/month. Everything in Essentials, plus vendor-negotiation work (optionally 20% of verified savings) and priority reviews.
- Accountants — $25 per client per month. Run Margin Sentinel across your client book.
Our guarantee: if Margin Sentinel doesn’t find at least 3× the yearly fee in savings, you get your money back. How we count: savings are the leaks confirmed across the statements we review in your first 12 months, measured against your tier’s yearly fee. If the total comes in under 3× the fee, email benny@lanawrai.com within 30 days of your annual review and we refund the fees you paid.
See it work – on sample numbers first
Don’t take our word for it. The free scan comes with a built-in sample statement: run it and watch Margin Sentinel find $3,967 a year in sample leaks – duplicate charges, a subscription that crept up 16%, bank fees, an impostor payee – each with its fix. Then run your own file the same way.
Run the free scan – sample included
Tested. In public.
We don’t ask you to trust the scan — we show the work. On November 13, 2026, the exact scan tool linked from this page passed 206 out of 206 verification tests, covering real bank CSV formats, duplicate charges, subscription price creep, bank fees, and impostor payees. The file you run is byte-for-byte the file we tested (SHA-256: 13212ff6fb39842dfffd8139e1483df56f32eb070c855785cd63c538ed11968f). And the scan runs entirely in your browser — your statement is never uploaded to us.
Start with the free leak scan, or talk to Benny about the service.
Findings are estimates for review, not financial or legal advice. How Margin Sentinel handles information is covered in the Margin Sentinel section of our Privacy & Terms.
Margin Sentinel is a Lanawrai Holdings LLC product.
Talk to Benny
Benny Daniel – Founder, Lanawrai Holdings LLC, Dallas, Texas
Email: benny@lanawrai.com – Phone: (972) 477-5356
Margin Sentinel is built and run by Benny Daniel, the founder of Lanawrai Holdings LLC in Dallas. The person who answers that email is the person who built the scan. Launch announcement: PRLog, November 13, 2026.
Questions, answered
What does the free scan check?
Think of it as a free expense audit of your own transactions. The scan works to find duplicate charges, spot subscription price creep (quiet price increases on tools you already pay for), surface bank fees worth challenging as part of a bank fee audit, and flag impostor payees whose names look almost identical to vendors you trust.
How does it work?
Export your bank or card transactions as a CSV file and drop it into the scan. The scan runs entirely in your browser — your statement is never uploaded, sent, or stored, and no bank login is needed. You get your report in about two minutes.
What does it cost?
The scan is free. If you want Margin Sentinel watching continuously, Essentials is $79/month and Pro is $199/month. Bookkeepers and accountants pay $25 per client per month to run it across their client book.
What is the guarantee?
If Margin Sentinel doesn’t find at least 3× the yearly fee in savings, your fee is refunded.
Has the scan been tested?
Yes. The scan passed 206 out of 206 verification tests and a separate run of 206 different data scenarios. This page publishes the scan file’s SHA-256 fingerprint, so anyone can confirm the file they run is byte-for-byte the file that was tested.