Article Summary
Profitability = Profit ÷ Revenue × 100. There are three versions: gross margin, operating margin, and net margin. The formula is the easy part. The hard part is knowing if your number is actually healthy and what to fix when it isn’t. For a service business doing $1M–$20M, the standard is 60-15-15 — 60% gross margin, 15% sales and marketing, 15% general and admin, 30% operating margin. Below that, scaling makes you busier, not wealthier. Here’s how to calculate yours and diagnose what’s broken.
The profitability formula — and why knowing it doesn’t fix anything
Profitability = Profit ÷ Revenue × 100.
That’s it. That’s the formula you came here for.
Think of it like this: out of every dollar you bring in, how much is left after paying for everything it takes to earn it? If you brought in $3M and kept $150k, your net profitability is 5%. Ninety-five cents of every dollar went somewhere else.
You could have Googled that in 30 seconds. You’re not stuck on the math. You’re stuck because you ran the math, got a bad-looking number, and now you don’t know if it’s actually bad, which margin matters most, or what to fix first.
I built Bennett Financials around that problem. Bennett Financials is a fractional CFO and tax planning firm that helps service business founders doing $1M–$20M diagnose growth bottlenecks, fix margins, and build businesses worth selling. Almost every founder I meet has already calculated their profitability. What they don’t have is a benchmark that tells them if their number is healthy, or a sequence that tells them what to touch first.
Here’s the tell that this is a real problem and not a bookkeeping one: 39% of small businesses have less than one month of cash on hand. Revenue isn’t the issue. Almost all of them are growing. They’re just not keeping any of it.
The rest of this post gives you the formulas, the benchmark that actually applies to a service business, and the order you diagnose in when the number comes back wrong.
The three profit margins — what each number actually tells you
You’ll hear “profit margin” used as if it means one thing. It means three.
Gross profit margin — is your pricing right, or are you giving work away?
Formula: (Revenue − Cost of Goods Sold) ÷ Revenue × 100
Gross margin is the first number that matters. It tells you what’s left after you’ve paid the people doing the work.
For a service business, Cost of Goods Sold includes:
- Delivery team salaries and benefits
- Subcontractors
- Delivery software and tools
- Client-facing travel
- Payment processing fees
- The delivery portion of owner comp (more on that in a minute)
It does not include your office, your CRM, your admin team, or your ads. Those come later.
If your gross margin is 45%, here’s what you just learned: out of every dollar of revenue, 55 cents went to deliver the work. You have 45 cents left to run sales, marketing, admin, leadership, and actually keep some. That’s not enough room.
Gross margin is almost always a pricing signal or a delivery efficiency signal. Usually both.
Operating profit margin — is the business itself profitable?
Formula: Operating Income ÷ Revenue × 100
Operating margin takes gross profit and subtracts sales and marketing, plus general and admin. This is the number that tells you whether you have a business or an expensive hobby.
If gross margin is “is pricing right,” operating margin is “is the whole company right.” A healthy service business produces a 30% operating margin. Most of the founders I meet are running between 3% and 12%.
Net profit margin — what’s left after everything
Formula: Net Income ÷ Revenue × 100
Net margin subtracts taxes, interest, and depreciation from operating income. This is what actually hits the bank account, and it’s the number most people mean when they say “profit margin” without qualifying it.
According to data from NYU Stern, the average net profit margin across all industries is 8.54%. Xero pegs a healthy small-business net margin at 7-10%.
Those numbers are fine if you’re running a restaurant or a grocery store. For a service business with no inventory and no equipment, 10% is the floor, not the target. I’ll explain why in the next section.
The only benchmark that matters for a service business — 60-15-15
Here’s the standard Bennett Financials runs every client against:
Metric | Target |
|---|---|
Gross margin | 60% |
Sales & marketing | ≤15% of revenue |
General & admin | ≤15% of revenue |
Operating margin | 30% |
Below-the-line (tax, interest, depreciation) | ~10% |
Net margin | 20%+ |
60-15-15. Add 60 minus 15 minus 15 and you get a 30% operating margin. That’s the destination. |
Why 30% and not 10%? Because service businesses are structurally high-margin. You don’t carry inventory. You don’t buy equipment. You don’t run a warehouse. The only thing between revenue and profit is labor and overhead. When I see a service company at a 5% operating margin, the founder isn’t building a low-margin business — they’re building a high-margin business badly.
The data lines up. Xero reports gross margin benchmarks of 50-70% for service businesses. 60 is the midpoint of healthy. On the operating side, TrueProfit’s 2026 benchmarks call 10-15% healthy, 15-20% strong, and 20%+ excellent. 60-15-15 puts you at 30%. That’s not aggressive. That’s what good operators actually run.
The target is universal. The timeline is not. Founders between $2M and $10M in revenue often plateau. Here’s where most of the $1M–$20M founders I meet are actually sitting when we run the first diagnostic:
Revenue | Typical GM | Typical S&M | Typical G&A | Typical Operating Margin |
|---|---|---|---|---|
$1M–$3M | 45-55% | 20-30% | 35-45% | Breakeven to negative |
$3M–$5M | 50-58% | 15-25% | 28-38% | 5-15% |
$5M–$10M | 54-60% | 15-25% | 22-30% | 10-20% |
$10M–$20M | 58-62% | 12-18% | 18-25% | 15-25% |
If you’re in the $1M-$3M band at 45% gross margin and 40% G&A, you’re not failing. You’re at a starting line with a clear target. Most founders get to 60-15-15 in 18-24 months of focused work. |
How to calculate your profitability in 10 minutes
Step 1: Pull 12 months of revenue
Trailing twelve months. Not calendar year, not your best quarter. TTM gives you a real read.
Step 2: Classify every expense into COGS, S&M, or G&A
This is where most P&Ls are wrong, and it’s the step that makes or breaks the diagnostic. Classify every line:
- COGS: delivery team salaries and benefits, subcontractors, delivery software, client travel, project materials, payment processing
- S&M: sales salaries and commissions, marketing team, ad spend, agencies, CRM and marketing tools, content production, events, lead gen, sales travel
- G&A: leadership salaries (non-delivery), admin staff, office and facilities, back-office software, legal, accounting, insurance, licenses, bank fees, non-sales travel
Owner compensation gets split. Track your time for 2-4 weeks. If you spend 50% on delivery, 30% on sales, and 20% on leadership, a $300k owner comp line splits $150k to COGS, $90k to S&M, $60k to G&A.
Step 3: Calculate gross, operating, and net margin
- Gross margin = (Revenue − COGS) ÷ Revenue × 100
- Operating margin = (Revenue − COGS − S&M − G&A) ÷ Revenue × 100
- Net margin = Net Income ÷ Revenue × 100
Step 4: Compare to 60-15-15
Line up your four numbers next to 60 / 15 / 15 / 30. Note every gap.
Step 5: Find the biggest gap — that’s what you fix first
More on the fix order in the next section. First, an example.
Worked example: $3M marketing agency
- Revenue: $3,000,000
- COGS: $1,650,000 → Gross margin: 45% (target 60, gap of 15 points)
- S&M: $540,000 → 18% of revenue (target 15, gap of 3)
- G&A: $720,000 → 24% of revenue (target 15, gap of 9)
- Operating income: $90,000 → Operating margin: 3% (target 30, gap of 27)
Three gaps, all real. The instinct is to attack the biggest percentage gap — G&A at 9 points over. Or the most visible line — office rent, a coach, a software bill you don’t love paying.
Both of those instincts are wrong. The 15-point gross margin gap is the one that’s killing this business, and it’s the one you fix first. Which brings us to the diagnostic sequence.
Want to know where your business sits against the 60-15-15 standard? The Scale-Ready Assessment runs your actual numbers, builds a custom tax strategy, and produces a full enterprise value report. Free for US-based service businesses doing $1M–$20M. It’s delivered through our fractional CFO services with financial planning. Book your free Assessment — 15 spots per month.
Your number is bad. Now what? The diagnostic sequence.
Every Bennett Financials client gets diagnosed in the same order: COGS → S&M → G&A. Never reordered. That sequencing is part of the broader fractional CFO advantage that moves you from chaos to clarity.
Here’s why the order matters.
COGS first because gross margin is the biggest lever, the shortest timeline, and usually a pricing problem. Pricing is the highest-leverage change in a service business — a price increase hits revenue immediately and flows almost entirely to the bottom line. In the $3M agency example above, closing the 15-point gross margin gap alone takes operating margin from 3% to 18%. Before touching anything else.
S&M second because you can’t honestly diagnose the growth engine with pricing broken. A broken close rate at broken pricing tells you nothing. Fix the denominator first, then look at unit economics.
G&A last because G&A is rarely killing the business, but it’s always dragging the margin. More importantly: when you fix COGS and S&M, revenue usually grows 30-50% over 12-18 months. Every dollar of revenue shrinks G&A as a percentage of revenue automatically. You don’t have to cut your way to 15%. You grow your way there.
The trap every founder falls into: “We’ll grow into it.” Meaning, “We’ll keep spending at this pace and revenue will catch up.” That’s not a plan. That’s a hope. If you’re above target on G&A, either you cut, or you have a credible revenue plan with math behind it. One or the other.
Back to the $3M agency. Diagnosed in order:
- COGS: 45% → 60% gross margin. Raise prices, insource contractors, or both. Operating margin jumps from 3% to 18%.
- S&M: 18% → 15%. Check LTV:CAC and CAC payback. Usually a funnel efficiency fix, not a spending fix.
- G&A: 24% → 15%. Combination of growth (revenue grew from $3M to $5M during the first two fixes, which automatically dropped G&A from 24% to 14%) plus targeted cuts.
Same business. Same founder. 18-24 months. 3% operating margin becomes 30%.
The most common reason your math looks wrong
Before you trust any of this, look at one more thing: how your expenses are classified on your current P&L.
Most founders I meet have misclassified books, and three misclassifications show up over and over:
- Owner comp dumped entirely in G&A. If you spend 50% of your time delivering work, half your comp belongs in COGS. A $300k founder who delivers half the work and has all $300k sitting in G&A is making gross margin look 5-10 points better than it actually is.
- Contractors buried below gross profit. “Outside services” or “1099s” often get classified as operating expenses. Anyone delivering client work is COGS, employee or contractor. Doesn’t matter what their tax form is.
- Payment processing fees in G&A. Stripe, bank merchant fees — those come out of the top line before you ever touch delivery. They belong in COGS.
Why this matters: misclassified books make a 45% gross margin look like a 62% gross margin. Now the diagnostic points at the wrong problem. You go hunting in G&A for cuts when the real issue is pricing and delivery efficiency you can’t see because the P&L is lying to you.
Bennett Financials currently manages a portfolio of 34 service businesses doing $96.2M in combined revenue. Our chief financial officer services for business growth all start the same way: reclassifying the P&L. Before the math. Before the benchmark. Before the fix order. You can’t run the formula on data that’s classified wrong.
Book a free Scale-Ready Assessment — three deliverables: full 60-15-15 financial diagnostic, a tax plan, and an enterprise value report showing your current multiple and the gap, all powered by our advanced tax planning and decision-ready financials system. 15 spots per month.
Arron Bennett is the founder of Bennett Financials, a fractional CFO and tax planning firm based in Knoxville, TN, serving US-based service business founders doing $1M–$20M in revenue. If you’re considering a partner, here’s how to choose the right fractional CFO services, and if you run a software company, see how a fractional CFO for SaaS companies focuses on metrics and forecasting.
