7 Overhead Costs That Quietly Destroy Contractor Profit Margins

Here is a pattern we see constantly reviewing P&Ls for home services companies: respectable gross margins — 50 percent, 52 percent, maybe 55 percent — and net profit in the single digits. The owner looks at the top of the P&L and assumes things are fine, not realizing that their overhead structure is quietly eating 35 to 40 percent of every revenue dollar before they ever get to the bottom line.

Overhead does not announce itself. It grows slowly — a new admin hire here, a software subscription there, a lease that made sense at $3M but has not been reconsidered at $7M. Each line item seems reasonable in isolation. In aggregate, these costs can represent the difference between a 10 percent net margin and a 20 percent one.

These are the seven overhead categories that most frequently destroy contractor profit margins — and what healthy benchmarks look like for each.

1. Office Staff That Expanded Faster Than Revenue

Office and admin salaries — dispatchers, CSRs, office managers, bookkeepers, and administrative support — should run 8 to 12 percent of revenue for a home services company doing $3M to $20M. When we see companies above 14 or 15 percent, it is almost always because they added headcount during a growth phase and never right-sized when the growth plateaued or the efficiency gains did not materialize.

The classic scenario: you go from $3M to $5M in revenue and add a second dispatcher, an office manager, and a bookkeeper. That was probably the right call. Then revenue grows to $7M and nobody reconsiders whether you need all those roles at the same scope. The dispatcher who was added for seasonal overflow is now full-time year-round. The office manager has an assistant who has an assistant.

The fix is not mass layoffs — it is honest evaluation. What does each role actually do? Can responsibilities be consolidated? Are you paying full-time salaries for work that could be handled part-time? In our experience, the most effective way to control admin costs is to define clear roles and measure output, not just presence.

2. Fleet Costs Nobody Is Tracking

Vehicles and fleet expenses — truck payments, fuel, maintenance, GPS tracking, insurance per vehicle — should run 2 to 4 percent of revenue. But many contractors have no idea what their fleet actually costs on a per-vehicle basis because they have never broken it out.

The hidden costs pile up: fuel for trucks that sit idle 20 percent of the time, maintenance on aging vehicles that should have been replaced, insurance premiums that increased when you added vehicles but were never renegotiated as a fleet, GPS tracking subscriptions on vehicles that are no longer in service. HVAC companies tend to run higher fleet costs because the trucks are larger (box trucks and vans carrying equipment), but that does not excuse not tracking the cost per truck per month.

Calculate your total fleet cost and divide by revenue. If it is above 4 percent, dig into per-vehicle economics. You may find that selling two underutilized trucks, optimizing routes to reduce fuel, or renegotiating your fleet insurance saves $30K to $50K annually — which at a 5x multiple adds $150K to $250K in business value.

3. Software Subscriptions That Accumulated Without Audit

Technology and software — ServiceTitan or Housecall Pro, QuickBooks, CRM, phones, IT infrastructure — should run 1 to 2 percent of revenue. We routinely see it at 3 to 4 percent in companies that have accumulated subscriptions over the years without ever auditing whether they are all still needed.

The pattern: you tried three different CRM tools before settling on one, but the other two subscriptions are still active. You upgraded your phone system but the old provider is still billing. You have project management software, scheduling software, fleet tracking software, and customer communication software that overlap in functionality. You signed up for a marketing platform during a free trial and forgot to cancel.

Run a full subscription audit. Pull your credit card and bank statements for the last 12 months and identify every recurring charge. You will almost certainly find $5K to $15K in annual subscriptions that can be eliminated without affecting operations. Small in isolation, but meaningful in aggregate.

4. Insurance That Has Not Been Competitively Bid

Insurance — general liability, workers’ compensation, auto, and umbrella — should run 2 to 4 percent of revenue. Workers’ comp alone can be 1.5 to 3 percent depending on the trade and your claims history. Many contractors set their insurance up once, auto-renew annually, and never shop it.

Insurance premiums fluctuate based on your claims history, revenue, headcount, and market conditions. A company that had a bad workers’ comp year three years ago may still be paying elevated premiums even though their safety record has improved. A company that has grown from $3M to $8M in revenue may be significantly underinsured — creating liability exposure — or paying premiums calibrated to the old revenue level that have not been adjusted.

Get competitive bids every two to three years from at least three brokers. Review your workers’ comp experience modification rate (EMR) and understand what is driving it. Ask your broker about safety programs, return-to-work initiatives, and claims management strategies that can reduce premiums. A 10 to 15 percent reduction in insurance costs on a $200K annual premium saves $20K to $30K per year — material overhead reduction for no operational change.

5. Marketing Spend Without ROI Tracking

Marketing is separated from operating overhead for a reason — it is a variable investment, not a fixed cost. The benchmark ranges from 5 to 12 percent of revenue depending on your growth strategy. A company in aggressive growth mode might spend 10 to 12 percent. An established company with strong referrals and brand recognition might need only 5 to 6 percent.

But the number that matters is not total marketing spend — it is ROI by channel. We see contractors spending $15K per month on Google Ads without knowing their cost per lead, cost per booked call, or cost per sold job. They know they are getting calls, but they cannot tell you which campaigns are generating profitable jobs and which are burning money.

Track cost per lead and cost per acquired customer by channel — Google Ads, Local Service Ads, SEO, direct mail, referral programs. When you can see that one channel generates customers at $150 each and another at $400, you can reallocate spend to the channels that work and cut the ones that do not. This is not overhead reduction — it is overhead optimization, which often frees up significant budget while actually improving results. See our KPI dashboard guide for the marketing metrics that matter.

6. Facilities That Do Not Match Your Current Operation

Facilities — rent or mortgage, utilities, warehouse space — should run 2 to 4 percent of revenue. This is one of the most binary overhead categories: either your space is right-sized for your operation, or it is not.

The common mistakes: you leased a shop when you were at $3M in revenue, and now at $8M you have outgrown it but are locked into the lease. Or the opposite — you moved to a much larger facility anticipating growth that has not materialized, and you are paying for square footage you do not use. Both scenarios destroy margin.

Evaluate your space against actual usage. How much of the warehouse is active storage versus dead inventory? Do you need the office space you have, or could you downsize? Are your utility costs reasonable for the square footage, or are you heating and cooling space that is not generating revenue? If your facilities cost is above 4 percent of revenue, the space is likely too expensive for your current operation.

7. Professional Fees Running on Autopilot

Accounting, legal, HR services, and consulting should run 0.5 to 1.5 percent of revenue. These are necessary costs — you need a CPA, you need an occasional legal review, you may need HR support. But they are also costs that tend to expand without evaluation.

Common overhead leaks: a CPA engagement that has grown from tax prep to a broad advisory relationship without a clear scope or ROI, legal retainers that provide “unlimited” consultation you rarely use, HR consultants who are essentially on payroll for work that an office manager could handle, and advisory services from coaches or consultants whose value was never measured.

Review every professional services engagement annually. What are you getting? What is it costing? Is the value clear and measurable? The point is not that professional services are bad — a good CPA and a fractional CFO can generate enormous ROI. The point is that professional fees should be evaluated like any other business investment, not left to accumulate unchecked.

Related: overhead benchmarks for home services companies, P&L analysis guide, building the back office that supports scale

About the Author

Raymond Gong

Raymond Gong is one of the senior partners of Profitability Partners, a fractional CFO and accounting firm built exclusively for home services companies — HVAC, plumbing, electrical, and roofing operators doing $5M–$30M in revenue. Prior to Profitability Partners, Raymond was a private equity professional at Black Diamond Capital Management and Third Lake Partners, a large family investment office. Raymond runs the books, the reporting, the profitability optimization, and the exit prep for contractors nationwide, working daily inside ServiceTitan, Housecall Pro, and QuickBooks — turning messy operational data into financials owners can actually run the business on, and that buyers and lenders take seriously. Raymond is a graduate of Vanderbilt University and is based in Tampa, FL.

Connect on LinkedIn

Raymond Gong

Raymond Gong is one of the senior partners of Profitability Partners, a fractional CFO and accounting firm built exclusively for home services companies — HVAC, plumbing, electrical, and roofing operators doing $5M–$30M in revenue. Prior to Profitability Partners, Raymond was a private equity professional at Black Diamond Capital Management and Third Lake Partners, a large family investment office. Raymond runs the books, the reporting, the profitability optimization, and the exit prep for contractors nationwide, working daily inside ServiceTitan, Housecall Pro, and QuickBooks — turning messy operational data into financials owners can actually run the business on, and that buyers and lenders take seriously. Raymond is a graduate of Vanderbilt University and is based in Tampa, FL.