What 'Projected Final Cost' Means and How to Use It

Actual cost tells you what a job has spent so far. That's useful, but it's backward-looking — it can't tell you whether a job in week two of six is on track or headed for trouble. Projected final cost is the forward-looking number that fills that gap: a forecast of where the job will land if nothing changes between now and close-out.

The formula

Projected final cost = Actual cost to date + Committed but unpaid cost + Remaining expected cost

In practice, most job costing tools simplify this to actual cost plus committed cost, since "remaining expected cost" is really just whatever's left of the original budget for work not yet started. The core idea is the same either way: it combines what's already spent with what's already promised, so you're not just looking at the past.

A worked example

A framing job has an expected cost of $18,000. Four weeks in, here's the picture:

At $15,500 projected against an $18,000 budget, this job still has $2,500 of headroom for the remaining framing labor and any material left to order — a healthy sign four weeks in. If the projected number had already been $19,000, you'd know today, not at invoice time, that something needs to change before the job closes.

Why "committed" matters as much as "actual"

A common mistake is tracking only paid costs. If you leave out the lumber order that's been placed but not yet invoiced, the job looks $4,500 healthier than it actually is. Committed cost — subcontractor agreements you've signed, material orders you've placed — is real cost the job owes, even if the invoice hasn't landed yet. Projected final cost only works as an early-warning number if committed cost is included.

How to use it mid-job

1. Check projected final cost against expected cost weekly on active jobs, not just at close-out.
2. If projected cost is tracking close to or over expected cost, find out which category is driving it — materials, labor, or subs.
3. Use that early warning to renegotiate a change order, tighten remaining spend, or adjust the schedule before the job is finished.
4. At close-out, compare the final actual cost to your last projection to see how accurate your committed-cost tracking was.

This is one of the clearest differences between reviewing a job "when it's done" and managing it while it's still open. Jobsheet calculates projected final cost automatically from actual cost, materials, labor, subcontractor entries and committed-but-unpaid costs you log against each job, so the number above is always current — not something you build in a spreadsheet once a month.