Specialty trade bookkeeping that fits how you actually work

Below: service work vs project work, tracking calls / maintenance agreements / installs, materials and inventory on trucks, job costing for small tickets vs large projects, technician labor by job, and the monthly reports a trade owner actually needs. Want trade-specific books set up right? Call (480) 617-2664, or start with a DIG Diagnostic.

The short answer

Specialty trades win when the books respect three realities:

1. Service and projects are different rhythms — different billing, different cost patterns, different cash timing. Mixing them without tagging turns every review into a guess.
2. Materials leave the shop before they hit a job — trucks, vans, and stock rooms are part of job cost, not free overhead.
3. Tech time belongs on the ticket — if labor does not hit the call or the project, job costing and the company P&L stop telling the same story.

Get those right and monthly close, cash planning, and owner decisions get simpler. Skip them and you get fiction: busy weeks that "feel" profitable until inventory, warranty callbacks, or a big install catches up.

Blackline Financial is construction-only bookkeeping and advisory for contractors and specialty trades (roughly $1M–$30M) — electricians, plumbers, HVAC, and related trades included. We do not prepare tax returns — tax timing and inventory elections are something we coordinate with your CPA. Monthly books and job-cost hygiene sit in Foundation / Frame; deeper owner packaging often sits in Blueprint. Every engagement starts with a DIG Diagnostic; every package is custom-quoted. Office: 4320 E Brown Rd Suite 103, Mesa, AZ 85205. East Valley and Phoenix-area trade owners often start from our city pages for Mesa, Gilbert, Chandler, Scottsdale, and Phoenix — this page owns the trade pattern; those pages own local hire intent.

Service work vs project work (two different books)

Most specialty trade shops run service and projects side by side. Treating them as one pile of revenue is how owners lose the plot.

Why "two books" does not mean two QuickBooks companies. It means clear classes, locations, departments, or Project types — whatever structure you can keep every day — so service margin and project margin can be read apart. One company P&L that blends a fat service month with a bleeding install hides both stories.

Cash timing differs too. Service often collects faster; projects may wait on draw packages, retainage, or GC pay cycles. A rolling 13-week cash flow (and the contractor view on contractor cash flow) should see both streams — not average them into one hopeful number.

Tracking service calls, maintenance agreements, and installs

Service calls

Every call needs a home: customer, tech, materials used, labor hours, and whether it was warranty, callback, or billable. If invoices go out from memory and costs land in "parts" with no job tag, you cannot answer which call types make money.

Practical pattern:

• Create a job / Project (or ticket ID) per billable call — or a tight batching rule you can defend, not a monthly dump into "service income."
• Code parts and tech time when the ticket closes, not in a month-end scramble.
• Flag warranty and callbacks so they do not inflate "service profit."

Maintenance agreements

Agreements are not the same as one-off calls. Billing may be monthly, quarterly, or prepaid; visits may lag or lead cash. Bookkeeping hygiene:

• Track which visits belong to which agreement.
• Keep prepaid / deferred treatment aligned with your CPA — Blackline does not invent tax elections; we keep the operational trail clean so the CPA can choose.
• Separate agreement revenue from extra work sold on the same visit (filters, upgrades, emergency after-hours) so you do not bury true T&M margin inside the contract.

Installs and project work

Larger installs behave like other construction jobs: estimate → cost codes → progress or milestone billing → closeout. Use the same money-page stack as GCs and other trades:

• Job costing and job costing in QuickBooks Online for structure
• Change-order accounting when the owner adds circuits, fixtures, or equipment
• WIP schedule and retainage when the contract holds money back
• Draw package discipline when you bill against an SOV

Materials and inventory on trucks

Specialty trades live on materials that leave the building before they hit a customer. Vans stocked with fittings, breakers, refrigerant, wire, and consumables are job-cost reality — not "shop supplies" forever.

This section is educational bookkeeping hygiene, not a pitch for any inventory software product. Use whatever system you already trust; the books still need a clear story.

What "good enough" usually means

1. Purchases have a destination — job, truck stock, or shop — when the bill is entered.
2. Truck stock is not free — when a tech uses parts on a call, the call (or a clear allocation rule) absorbs the cost.
3. Shrink and warranty parts are visible — lost, damaged, or free warranty materials should not silently inflate job margins elsewhere.
4. Big special-order equipment ties to the install job at purchase — not to a generic materials account that you "fix later."

Inventory valuation, capitalization, and tax treatment stay with your CPA. Blackline keeps the operational coding clean so job cost, month-end close, and cash views are usable — we do not sell or certify inventory software.

Job costing for small tickets vs large projects

Job costing still applies when the "job" is a two-hour service call — the grain changes.

Do not force every service call into a 40-line cost-code tree. Techs will not use it. Do force some job identity so you can see average margin by call type, tech, or agreement — and so materials/labor do not vanish into overhead.

Do not treat a $80k install like a fat service ticket. Once duration, deposits, change orders, or retainage show up, use full job costing, link QBO Projects setup, and pull WIP when earned vs billed matters.

Technician labor by job

Labor is usually the largest controllable cost in a trade shop. If tech hours only show up in payroll totals, you cannot manage dispatch, overtime, or which work types pay.

What to capture

• Hours on billable calls / projects
• Hours on warranty / callbacks
• Shop, travel, training, and idle time (so jobs are not blamed for unavoidable non-billable)

Burden still matters. Straight wages alone understate job labor. Payroll taxes, workers' comp, benefits, and PTO loads belong in a consistent burden approach — same idea as on the job costing hub. Classification (employee vs sub) and certified-wage rules are for your payroll provider, counsel, and CPA; Blackline keeps the job-cost side consistent and coordinates when tax questions appear.

Dispatch software and payroll tools vary; the bookkeeping rule does not: time needs a job home before payroll is closed, not after the owner asks why June felt tight.

Monthly reports a trade owner needs

You do not need a 40-tab dashboard. You need a short stack you open on a calendar.

Deeper owner packaging — bonding conversations, lender packs, forecast discipline — often sits in Blueprint / fractional CFO for construction after the books are trustworthy. The starting move is still a DIG Diagnostic, then Foundation / Frame on services.

East Valley / Phoenix note. Light local context only: trade shops across Mesa, Gilbert, Chandler, Scottsdale, and Phoenix hit the same service-vs-project pattern. Hire-intent city pages stay on /construction-bookkeeping-mesa-az, /construction-bookkeeping-gilbert-az, /construction-bookkeeping-chandler-az, /construction-bookkeeping-scottsdale-az, and /construction-bookkeeping-phoenix-az. This URL is the specialty-trade pattern page — one page for electricians, plumbers, and HVAC — not three fake storefronts.

Labeled example (illustrative only)

Illustrative only — not a client story, not a promise of results.

A fictional HVAC shop books a strong service month and one large install. The company P&L looks healthy. On review:

• Service tickets had parts pulled from vans with no ticket coding → service gross margin overstated.
• The install had equipment on the job but labor partly left in "shop" → install looked better than field reality.
• A maintenance-agreement prepaid balance was recognized as ordinary service income → cash and revenue timing disagreed.

After retagging tickets, coding truck parts to calls, putting install labor on the Project, and parking prepaid with the CPA's method, the owner could see: service still solid, install thin, agreement cash not the same as earned service. No new software heroics — clearer rules and a monthly review.

What "good" looks like

FAQ

What is specialty trade bookkeeping?

Specialty trade bookkeeping is construction-aware bookkeeping set up for electricians, plumbers, HVAC contractors, and similar trades — especially the mix of service calls, maintenance agreements, and project installs, plus materials on trucks and technician labor by job.

Why can't we run service and projects as one revenue bucket?

Because they have different billing speed, cost patterns, and cash timing. One blended number can hide losing installs behind busy service weeks (or the reverse). Separate tags or departments let you manage both.

How should materials on trucks show up in the books?

Purchases should land as job, truck stock, or shop — and parts used on a call should hit that ticket (or a clear allocation rule). This is operational hygiene; inventory valuation and tax treatment stay with your CPA. Blackline does not sell inventory software.

Do small service tickets need full job costing?

They need a ticket or job identity with labor and materials — not necessarily a deep cost-code tree. Large installs need fuller job costing, and progress-billed work needs WIP discipline.

What monthly reports should a trade owner review?

At minimum: service vs project profitability, a sample of ticket/job margins, AR (and retainage if you hold or are held), cash outlook, and a completed month-end close. Add WIP when you progress-bill.

Can Blackline set up books for our electrical, plumbing, or HVAC company?

Yes — for construction and specialty trades in the roughly $1M–$30M range. Start with a DIG Diagnostic; ongoing books in Foundation / Frame; owner-level packaging in Blueprint. Custom-quoted on services / contact. We do not prepare tax returns; we coordinate with your CPA.