Why a profitable job can still need your cash
A quote can show a profit while its payment schedule asks you to fund part of the work yourself. The missing piece is timing: when customer money arrives compared with when materials, crews and other job costs must be paid.
Consider this fictional job. The contract price is $40,000. All the costs entered for the example total $32,000. The remaining $8,000 is the amount left after those entered costs—not a promise of company profit after every tax, expense or other project.
Here is one possible schedule, starting with no cash reserved for the job:
| Day | What happens | Cash movement | Cumulative job cash |
|---|---|---|---|
| -1 | Customer deposit arrives | +$8,000 | $8,000 |
| 0 | Materials are paid | −$20,000 | −$12,000 |
| 7 | First crew payment | −$4,000 | −$16,000 |
| 14 | Customer progress payment | +$20,000 | $4,000 |
| 21 | Remaining crew and other entered costs | −$8,000 | −$4,000 |
| 28 | Customer final payment | +$12,000 | $8,000 |
The job ends with $8,000 left, but reaches a $16,000 shortfall on day 7. That is the extra funding this isolated schedule requires at its tightest point. The final margin does not pay the crew during the gap.
Change the timing, then compare the result
Now assume the supplier agrees to move $10,000 of the material payment from day 0 to day 15, with no added fee. The contract price and total entered costs stay the same. The example’s lowest balance becomes −$6,000 instead of −$16,000; it still ends at $8,000.
Nothing in this example makes the job more profitable. The difference is $10,000 less cash needed before the progress payment catches up. Supplier terms must actually be agreed; the calculator cannot grant them. Add any real financing fees or higher prices before comparing the options.
Plan the dates you can actually rely on
Start with the payments your contract and supplier agreements allow, your actual purchasing dates, and your crew or subcontractor payment obligations. Then test what happens when the progress or final payment arrives later than planned. A customer promise and a collected payment are different assumptions.
This illustration excludes other jobs, unentered business expenses and taxes, and financing costs. The deposit arrives before the first bill, and there are no same-day receipt/bill conflicts in the example. With same-day events, use the real clearing order or a conservative ordering. A model is only as useful as the dates and costs you put into it; it is not a recommendation of a legally permitted deposit amount.
To put your own dates into a forecast, follow our construction payment schedule guide, including a same-day payment example and a late-payment check.
Check your own job before committing
Use JobFloat’s free calculator to enter your quote, loaded costs and payment timing. No account is needed for the calculator. The optional $49 USD plus applicable tax planning pack captures one set of job inputs with a downloadable report, cash schedule CSV and timing comparisons. It is a one-job purchase, not a subscription.