Bookkeeping for electrical contractors, explained by a CPA - chart of accounts, job costing, supply-house reconciliation, WIP, software and when to outsource.
Bookkeeping for electrical contractors is a different sport from keeping books for a store or an office. Your money lives in jobs - materials bought this week, labor burned this month, retainage released next quarter. If your books can't tell you what each job actually cost, they're not telling you anything. This guide covers how a CPA sets up and runs bookkeeping for an electrical contracting business, from the chart of accounts to the weekly routine.
Four things break generic bookkeeping the moment you apply it to an electrical shop: progress billing (you invoice in draws, not at delivery), retainage (5-10% of every commercial job held until closeout), supply-house accounts (hundreds of line items a month across Rexel, CED, Graybar, City Electric), and crews (labor that must land on the right job, with burden, or your margins are fiction). A bookkeeper who doesn't build around these four will produce tidy-looking books that are wrong where it counts.
Skip the default software template. An electrical contractor's chart of accounts should separate, at minimum:
Every dollar of cost should carry a job name. Labor with burden, materials from the supply house, subs, rentals - all coded to the job, ideally by cost code (rough-in, trim, service). Do that consistently and your books start answering the questions that grow a shop: which GCs are worth bidding, which project types quietly lose money, and whether your bid margins survive contact with reality. This is the core of our job costing & WIP reporting service - and the single biggest difference between contractor bookkeeping and the generic kind.
Supply-house accounts move too fast for a monthly look. Weekly, match every statement line to a job: catch mis-billed items, capture return credits (they go missing constantly), and keep true material cost per job current. A simple PO or job-name discipline at the counter - every ticket tagged before it's picked up - makes this ten times easier.
Invoice draws on schedule, record retainage in its own account the moment it's withheld, and calendar every release date. Know your mechanic's-lien deadlines in your state so a slow GC never turns earned money into a write-off. We wrote a full breakdown in our guide to retainage and cash flow.
Work-in-progress reporting compares what you've earned on each open job against what you've billed. Under-billed means you're financing the GC; over-billed means a cash cliff is coming at closeout. Sureties and lenders will ask for a WIP schedule the moment you bid bonded or larger commercial work - having a clean one is often the difference between growing your bond line and being capped.
Crew payroll needs burden allocated to jobs, not parked in overhead. If you bid public work, certified or prevailing-wage payroll has its own filing rhythm. And every subcontractor who crosses $600 gets a 1099 - late or missing filings are one of the easiest penalties to avoid.
For most electrical contractors, QuickBooks Online is the hub - it's what nearly every accountant, lender and surety can work with. Pair it with your field software (dispatch, estimating, time tracking) and make sure the sync is actually mapping costs to jobs, not just dumping totals. Software doesn't replace the discipline above - it just makes it faster.
Books that follow this rhythm are always lender-ready - and tax season becomes a non-event.
Clean job-costed books are what make real tax strategy possible: S-corp salary planning, Section 179 and bonus depreciation timed to equipment purchases, and quarterly estimates that match how cash actually flows through draws and retainage. That's why we pair every bookkeeping engagement with year-round tax planning - the savings live in the books, not in April.
Early on, many electricians run their own books at night - workable until job volume makes coding sloppy. A part-time bookkeeper helps, if they truly know job costing (here's how to vet one). The step most growing shops eventually take is outsourced accounting - books, job costing, payroll, 1099s and tax in one engagement. We broke down what that costs in the Carolinas.
Division 26 CPA does bookkeeping for electrical contractors exclusively - weekly books, supply-house reconciliation, job costing and WIP, paired with year-round tax strategy, across North and South Carolina. See our packages or book a consultation and we'll review your current setup, job by job.
This article is general information, not tax advice; please consult a CPA about your specific situation.
