Case 4:25-cv-01778 · U.S. District Court

We found $475,000 of CAM billing errors in a real court case — down to the dollar.

Most small landlords get their yearly CAM bill wrong and never notice — either overpaying their property manager, or not charging tenants what the lease actually allows. Upload your lease and your statement, see your number in minutes. Free.

Check my CAM statement → See the $475K example

No credit card · first check free · works from a PDF

The proof

We re-ran a real CAM audit from a federal lawsuit. The numbers matched.

Webster University sued its landlord over its CAM bill (case 4:25-cv-01778). We fed the same lease and the same statement into this tool — and got the auditors’ numbers back, to the penny.

−$475,099.64

over-billed, removed from the bill

+$241,445.26

refund the landlord was owed back

to the cent ✓

matched the real audit, line for line — re-run it and it ties

Exhibit A · The leak report The CAM leak report this tool produced for the Webster case: a dark summary band reading $398,376.87 you may be over-billing, above itemized findings like Insurance $139,717.48 over-billed, each citing the lease clause it breaks.

The CAM leak report this tool produced for the Webster case: a dark summary band reading $398,376.87 you may be over-billing, above itemized findings like Insurance $139,717.48 over-billed, each citing the lease clause it breaks.

The real report, generated from the Webster lease and statement. The free check alone surfaced $398,376.87 of over-billing here — the line marked “needs your ledger” is what the deeper paid audit digs out.

How it works

Three steps. No spreadsheets, no lawyer.

AI reads your two PDFs

Drop in your lease and CAM statement. Our AI pulls out every clause and charge in seconds — no typing, no spreadsheets, even from a messy scan.

We check every charge against your lease

Exact, deterministic math — never AI guesswork — tests each charge against what your lease actually allows.

See your number, line by line

What you’re over-billed, what you’re owed, and the lease clause behind each one. Free.

What you actually get

Plain-English findings — not accounting jargon.

Every issue named in normal words, with the dollar amount and the exact lease clause behind it. Real examples from the lawsuit above:

A store was billed for an apartment’s repairs

$1,200 for bed-bug treatment in apartment unit 1711 landed on the retail tenant’s CAM bill. Tenants pay to keep the shared areas running — not to fix the apartments upstairs.

Lease §4.3 · over-billed $1,200

The management fee was taken on taxes and insurance too

The lease lets the manager charge a 15% fee on upkeep costs. They also charged it on property taxes and insurance, which the lease leaves out — so the fee was bigger than the lease allows.

Lease §5.1 · over-billed

It also finds money you’re leaving on the table

It’s not only over-billing. The tool flags costs your lease lets you pass through to tenants that never made it onto the statement — money you’re owed but didn’t collect.

Lease §4.2 · under-collected

Exhibit B · One finding, up close A single finding card: headline 'Insurance (LIHTC-attributable) doesn't belong on the bill', amount $139,717.48 over-billed, a plain explanation, and the reference line R20 - Ironclad - Lease Sec 1.35(b)(ix), 4.3(i).

A single finding card: headline 'Insurance (LIHTC-attributable) doesn't belong on the bill', amount $139,717.48 over-billed, a plain explanation, and the reference line R20 - Ironclad - Lease Sec 1.35(b)(ix), 4.3(i).

Every finding reads like this — what’s wrong in plain words, the dollar figure, and the exact lease section behind it. No accounting background needed.

Exhibit C · The letter you can send A draft demand letter addressed to the property manager, listing each over-billing with its lease clause and a total in question of $398,376.87, with a Print / save as PDF button.

A draft demand letter addressed to the property manager, listing each over-billing with its lease clause and a total in question of $398,376.87, with a Print / save as PDF button.

One click turns the findings into a dated letter for your property manager — itemized, every clause cited, ready to print. Review it with your CPA or attorney before sending.

What we check

The 25 things we check on every bill.

Not a black box. These are the same checks a forensic CAM auditor runs by hand — grouped by what they catch.

Fees & shares

Management fee on the wrong cost base
Admin fee stacked on another fee
A tenant share % that doesn’t match the lease
Tenant shares that don’t add up across leases

What’s allowed on the bill

Excluded costs billed anyway
Another unit’s costs on your tenant’s bill
A direct-billed cost also in the shared pool
The same charge billed twice
A one-time capital cost billed all at once

Caps, gross-up & increases

Charges over your lease’s yearly cap
A yearly increase the lease doesn’t allow
A cap applied to the wrong costs
A base-year baseline that’s off
Gross-up applied to fixed costs
Gross-up on a directly-billed line

Money you’re owed back

Estimates collected but never reconciled
A tax credit never passed through
A recoverable capital cost left off
Unused cap room you didn’t collect
A mid-term tenant billed for a full period
Vacancy shifted onto your tenant

Twenty-five checks in all. The free check runs every one it can read from your statement and lease; the deep audit adds the ones that need your ledger.

In the bills we’ve tested, the over-billing ran from a few percent to nearly a quarter of the entire CAM total. On a $500,000 bill that’s real money — and most landlords sign off on it without ever checking.

Why we built this

Most CAM tools are built for tenants clawing money back. We built this for the landlord — because too many get buried in bills they didn’t cause, and dragged into disputes they can’t afford. You should be able to check your own numbers in an afternoon, not pay a consultant for two weeks.

— Hongix Labs

Straight answers

Your documents stay yours

To read a PDF the tool sends its text to our reader (Google Gemini). You can also skip that and type the figures in by hand. We don’t sell or share anything you upload.

Free check, pay only for the deep audit

The free check costs nothing — run it as much as you want. The full general-ledger audit is $149 per property, money-back if it doesn’t find more than it costs.

Deep audit · early access

We take a limited number of properties at a time.

The free check stays open to everyone. The full general-ledger audit is hands-on — we run each one ourselves — so we keep the list short to protect the quality. Reserve your spot before it fills.

Join the waitlist — $149, money-back →

Questions landlords actually ask

Do I need my accounting records?: No. The free check works from just your lease and your CAM statement. The deep audit (the one that found the $475K) uses your general ledger, but you can start without it.
What if I already approved last year’s bill?: Doesn’t matter. Most over-billing gets approved because nobody catches it — and many leases give you a window to go back and recover it.
I’m the landlord, not the tenant. Is this for me?: Yes. Most tools are built for tenants clawing money back. This one is built for you: catch your manager’s mistakes, and find what you’re not collecting from tenants.
Is my lease private?: Yes — see “Your documents stay yours” above. You can also run the whole thing by hand without uploading anything.

Check your CAM statement. It’s free.

Check my CAM statement →