Where is your business losing money? A six-point checklist

Most businesses lose money in six predictable places: payment fees, duplicate orders, unbilled work, the cost of waiting to be paid, vendor invoice drift, and jobs whose margin nobody measured. None of them appears on a P&L as a line called “losses” — which is exactly why they persist.

The pattern was summed up by a supply-chain manager in Reddit’s r/supplychain community, describing an accidental $150,000 over-order: “Nobody cared and I never heard anything about it and we just threw everything in the garbage.”

Money that was “always lost” creates no pain spike, so nobody looks. Here’s where to look — six places, in the order of how fast you can check them.

1. Payment processing costs

Percentage fees make sense on a £40 checkout. They make no sense on a £45,000 invoice — yet many platforms charge the same way for both. One contractor found his accounting platform’s 1% bank-payment fee meant a $45k invoice cost $450 to receive. He now credits customers $25 to use a different rail. If your invoices are large, pull your last quarter of processing statements and calculate the effective rate per invoice. Anything without a cap deserves a hard question.

2. Duplicate orders and duplicate invoices

Duplicates hide well: different PO numbers, different weeks, same money gone. An electrician in Reddit’s r/Construction community described ordering 48 non-refundable floor boxes while sick — then ordering the same 48 again a week later, on a second PO for the same project: “It felt like the easiest mistake to NOT make. But I made it anyway.” Check any vendor you’ve paid twice in a month for near-identical amounts.

3. Work you did but never billed

Unbilled scope is pure margin walking out the door. The client adds one small thing, then another, and six weeks later you’re doing twice the work for the original price — without anyone ever agreeing to that out loud. If you don’t have a written change-order habit, this is your biggest leak, and no software finds it after the fact.

4. The cost of waiting to be paid

Net 30 that actually pays in 75 has a price: the overdraft you carry, the early-payment discounts you can’t take, and — worst case — the factoring fee. One contractor in the same r/Construction community wrote that he factored his invoices “at a percentage that cost me the profit on the job.” Multiply your average overdue balance by your cost of money; that number belongs in your monthly review.

5. Vendor invoices that drift from the quote

Fleet and facilities operators know this one: calibration fees, “data charges,” platform fees — line items that were never in the quote, added a few pounds at a time. Operators describe building a custom spreadsheet per vendor just to keep them honest. Take your ten biggest suppliers and reconcile the last invoice against the original agreement; drift compounds.

6. Jobs you’d swear are profitable

The question owners actually ask isn’t “what’s our EBITDA” — it’s “which jobs actually make money?” If labour, materials, transport and subcontractor costs land in your books weeks after the job closes, you’re pricing the next job on a feeling. The fix is unglamorous: track costs to the job as they happen, not at month-end. (Our guide to job-level margin goes deeper.)

The habit that beats the checklist

Run the checklist once and you’ll find money — most businesses do on the first pass. But the real fix is making the invisible visible continuously: every invoice checked against its PO, every fee benchmarked, every job carrying its own running margin.

That’s what Fynex is built to do. It sits on top of your bank, your payment providers and your accounting — it doesn’t replace them — reads every transaction and invoice as it happens, and flags the duplicates, fee anomalies and margin slips while they’re still small. Owners ask us “where are we losing money?”; the honest answer is that after the first month, Fynex usually answers before they ask.

Run your business, not your books — and let the leaks surface themselves.