Buying guideAccounting & bookkeeping
Accounting Software with Job Costing: When It Is Enough and When It Is Not
How accounting software with job costing handles monthly reconciliation and work in progress, and when a small business needs a separate tool.
Accounting software with job costing lets you assign income and expenses to individual jobs or projects inside your general ledger. For many small service businesses and contractors, it’s enough: one set of books, and profit per job without another system. It stops being enough when field data (hours, materials, change orders) can’t reach the books quickly and accurately.
This guide explains what accounting-based job costing does well, where it falls short, how to reconcile job costs monthly, and two templates for WIP and retainage. For the full overview of options, see our pillar guide to job costing software.
How job costing works inside accounting software
The basic mechanism is the same in most accounting systems:
- Create a project or job for each customer job.
- Assign invoices to the job (revenue).
- Assign bills, expenses and purchases to the job (direct costs).
- Assign payroll or time entries to the job (labor).
- Run a profitability report per job.
QuickBooks Online, for example, lists “Track project profitability” on its Plus plan and “Advanced project financials” on Advanced (which also mentions auto-creating projects and allocating costs). The Simple Start and Essentials plans don’t list project features. Check what’s included in each plan before you upgrade.
When accounting software with job costing is enough
| Sign | Why it works |
|---|---|
| Your bookkeeper enters most costs anyway | Coding them to a job adds little work |
| Jobs are few and fairly large | Assigning each bill to a job is manageable |
| Labor is tracked through payroll you already run | Time can be assigned to jobs at payroll |
| You review profit monthly, not daily | Month-end data is fresh enough |
| Billing is simple (one invoice or a few) | No complex progress billing to manage |
When it is not enough
| Sign | What’s missing |
|---|---|
| Technicians track time on paper and someone retypes it | Field time capture |
| Many small jobs a week | Coding each expense by hand becomes a chore |
| You need to see costs during the job | Real-time budget vs. actual |
| You bill by progress with retainage and change orders | Contract billing features |
| Materials come from stock, not job-specific purchases | Inventory allocation to jobs |
In those cases, contractor or field service software usually tracks the job and syncs totals to accounting. Knowify, for example, lists progress billing, change orders, AIA pay apps with retainage tracking and QuickBooks Online sync; for construction specifically, see our guide to construction job costing software.
Construction accounting software with job costing
Contractors have extra accounting needs: retainage receivable and payable, work in progress, and sometimes certified payroll for public work. General small-business accounting software can handle some of this with careful setup (separate retainage accounts, project classes or tags), but it’s manual. Construction-focused accounting or billing tools handle it directly. The right choice depends on volume: two or three open projects can live in general accounting; a dozen usually can’t.
How to reconcile contractor job costs monthly
A monthly routine keeps job reports trustworthy:
- Close the period’s payroll and confirm every hour is assigned to a job or to overhead.
- Review unassigned expenses: filter bills and card transactions with no job and assign them.
- Check materials from stock: allocate stock used on jobs this month.
- Match invoices to jobs: every billed amount belongs to a job.
- Run profit by job and compare with the estimate. Investigate big gaps.
- Tie out to the books: job costs plus overhead should equal total expenses for the period.
The same routine is in our job costing pillar guide; doing it inside the accounting system means step 6 is automatic.
Construction work in progress tracking template (Excel)
If your accounting software doesn’t produce a WIP report, build one monthly from its job reports:
| Project | Contract value | Est. total cost | Cost to date | % complete | Earned revenue | Billed to date | Over/(under) billed |
|---|
Formulas: % complete = cost to date ÷ estimated total cost; earned revenue = contract value × % complete; over/(under) billed = billed to date − earned revenue. Your accountant can tell you whether and how to record the adjustment in your books.
Hypothetical example: contract $30,000, estimated cost $24,000, cost to date $18,000 (75% complete), so earned revenue is $22,500. Billed $20,000: underbilled by $2,500. That’s work done but not yet invoiced: send the next progress invoice.
Construction retainage accounts receivable spreadsheet template
Retainage receivable should sit in its own account or at least its own report, because it isn’t due on normal terms:
| Project | Customer | Invoice # | Retainage held | Release condition | Expected date | Requested | Received |
|---|
Review it with your aged receivables every month, and request release as soon as the conditions are met.
A note on rent and other non-job costs
Some searchers ask how to reconcile rent payments by tenant: that’s property management accounting, not job costing, and works differently (by unit and lease, not by job). For contractors, rent for your shop or yard is overhead, not a job cost. Keep it out of job reports, but make sure your gross profit per job is high enough to cover it.
Frequently asked questions
Can I do job costing in my accounting software’s basic plan? Check the plan’s feature list; project or job features are often on higher plans.
Should technicians enter time in accounting software? Usually not directly. A time tracking or field app that syncs to accounting is easier and more accurate.
Is accounting job costing accurate enough for bidding? It’s accurate after the fact, which is what you need to refine estimates. For estimating itself, see our contractor cost estimating guide.
What’s the difference between classes, tags and projects? They’re different ways to label transactions in different accounting systems. Projects usually give the clearest profit-per-job report; ask your accountant which fits your setup.
Sources
- QuickBooks Online plans and pricing, Intuit (accessed October 28, 2026)
- Knowify pricing, Knowify (accessed October 28, 2026)
How we researched this
This article is based on documentation research, including the sources listed above. We have not run hands-on tests of specific products for this piece. Read our research methodology. Spotted an error? See our corrections policy.