Bookkeeping for Plumbing Companies

Service calls and installation jobs need different views

A busy schedule can hide weak margins. Small parts purchases land on a card, equipment comes from a supplier, and a crew spends another day finishing a job that was supposed to be done. If those costs stay in one general expense category, the bank balance will not tell you which work paid off.

Separate recurring service work from larger installations. Tag direct costs to the job where the records support it. Keep shared truck, shop and office costs visible rather than quietly treating them as free.

What plumbing bookkeeping covers

• Service and installation revenue. Organize sales by the kinds of work you perform so your monthly P&L is useful.
• Materials and job costs. Code fixtures, pipe, fittings, equipment and subcontractor costs to the right job. Reconcile supplier bills and credits instead of counting only card spending.
• Crew labor. Code payroll costs and agreed labor burden to jobs using the time records you provide.
• Deposits and open invoices. Keep customer deposits and remaining balances clear. For contract work, separate retainage from ordinary receivables.
• Truck and shared costs. Keep vehicle, fuel, insurance and shop costs organized, with any job allocation based on the method you agree.
• Vendor records. Keep subcontractor payment records separate from material purchases for a cleaner tax-preparer handoff.

An example: sales are not the same as job margin

Illustrative example, not a Mispar client result: a bathroom repipe brings in $8,000. Materials cost $2,600, crew labor and agreed burden cost $2,000, and a subcontractor costs $400. Direct job cost is $5,000, leaving $3,000 before shared overhead and tax.

If the same costs sit in company-wide categories, you may know the month was profitable without knowing whether that repipe was. Job coding gives you a more useful starting point for the next quote.

Numbers worth watching

Your monthly tax-ready P&L and balance sheet remain the foundation. Job-level reporting depends on consistent job codes and time/material records.

• Service revenue versus installation revenue.
• Direct margin by job.
• Labor cost against the job estimate.
• Open invoices and customer deposits.
• Shared vehicle and shop costs.

Records that make the close easier

Send supplier statements, job IDs, crew time, customer invoices and bank/card activity. If you use ServiceTitan, Housecall Pro or another field-service tool, tell us during setup. We review its available reports and exports; we do not assume a particular app integration is included.

Tax-ready records, not blanket tax rules

Whether materials, labor or a bundled contract are taxable depends on the location and the work. We keep the records organized for your tax professional to review. Worker classification and information-return requirements also need their own review; calling someone a subcontractor does not settle either question.