Cost, Owed, Paid: Why an Unpaid Bill Still Counts Against the Job

Keep these three questions separate.

One purchase can move through all three at different times. Say your tile sub finishes the bathroom and bills $6,050.

Nothing about the work changed on the day you paid. Only the debt and the cash changed.

This guide is about the records you use to run the job. It is not tax or financial-statement advice; your bookkeeper or accountant decides how transactions go in the books and on the return. Clamp is not a general ledger either.

The checkbook answers one question: what money has left? It does not answer what the job cost, and the difference can be thousands of dollars.

The tile sub finishes $6,050 of work and the invoice sits unpaid for three weeks. If you count only checks that cleared, the job looks $6,050 cheaper for those three weeks.

Nothing got cheaper. The tile is set, the sub earned the money, and the job used the work. Only the payment is late.

Review the bathroom in that window and it looks more profitable than it is. Price the next bathroom from it and your history is missing the whole tile package.

Michael C. Stone, a builder and remodeler with more than six decades in the industry and author of Estimating Construction Profitably, makes job costing useful by comparing estimated cost with actual cost once the work is built, and he stresses keeping entries current enough that the actuals mean something. The checkbook cannot do that by itself.

For job costing, record the cost when the job gets the work or the material, not when the money moves.

How to enter each one is in the guides to receipts, purchase orders and bills, labor costs and job costing. The principle under all of them is the same:

That is why a vendor bill can count in the job's actual cost while it still sits in what you owe.

Stone's approach also depends on sorting costs the same way every time: what belongs to one job is recorded as that job's cost, so the estimate and the actual can be compared on the same basis.

This is where a simple spreadsheet makes a second mistake. The contractor enters the tile invoice as a $6,050 cost. Three weeks later the check goes in as another $6,050 expense. Now the sheet says tile cost $12,100, for one bathroom of tile.

Not a bill that is a cost and then a payment that is another cost.

The cost stays $6,050 the whole way. The payments explain how the debt was settled; they never create another $6,050 of work.

That is the old way's hidden price: it stays "simple" by having you record one purchase twice, then fix it by hand.

The same idea works in reverse. You buy $1,000 of tile for a job, then return $400 that wasn't used.

A shoebox of receipts easily leaves the job at $1,000, because the return is on a different slip. The next estimate learns the wrong number.

What happens to owed and paid depends on how the purchase was settled.

The receipts guide covers returns on paid purchases. The bills guide covers vendor credits and refunds.

A bill does not have to be paid all at once. Say the sub's finished work costs the job $6,050 and you pay $3,000 now, $2,445 later, and hold $605 under the subcontract until its release condition is met.

The job still used $6,050 of subcontract work. The payment pattern does not split it into three costs.

Retainage shows the difference clearly: the work is already job cost, even though part of the payment is not yet due.

Whether you can hold retainage, and when it must be released, depends on the subcontract and the law where you work. This guide does not set those terms. Most residential contractors won't hold any; if you do, the bills guide shows how Clamp records it.

Keeping cost, owed and paid apart improves four decisions.

Your job cost review

Job costing compares the job's actual cost with the estimate. If unpaid bills are missing, "actual" isn't. The $6,050 tile bill has to be in the job before you can honestly ask whether tile was estimated right. Stone's method is built on that loop: compare estimated with actual, find where they differ, and use it on the next estimate.

Your next estimate

If the bathroom really used $6,050 of tile sub, the next similar estimate should learn $6,050. Not $0 because the check hadn't cleared, and not $12,100 because the bill and the check were both entered as cost. The next price is only as good as the history behind it.

Your cash planning

Job cost tells you how the job performed. Bills owed tell you what cash you need. Those are different questions. You can have: a job with accurate cost and a large unpaid bill; a fully paid job whose cost was terrible; a profitable job with tight cash for a few weeks; money in the bank while several large bills are still unpaid.

Your bank balance can't tell those apart.

Your bookkeeper

Clamp's accountant export keeps the records apart on purpose: job costs, bills owed at the period end, customer payments, and a reconciliation that checks they agree. Bills are not extra costs. Cost is not cash.

The customer side has the same shape

The contract amount is what was sold. An invoice is what the customer owes now. A payment is what they have actually paid. A customer payment doesn't create another sale any more than paying a vendor bill creates another cost. The invoice guide covers that side.

One bathroom over a month. Every row shows the running totals.

On October 3 the job already cost $6,050, though no check had cleared. On October 14 the payment moved owed and paid; job cost did not move.

Cost and paid match at the end only because every bill is paid and the refund is in. They did not match during the month, and that is the whole point.

Three questions, three records. Sometimes the numbers meet. That doesn't make them the same thing.