Bottom line: The cost of running an agency is mostly people. Using the assumptions below (US, mid-cost city, salaries loaded by 30% for payroll taxes and benefits), a 5-person agency costs about $63,000 a month to run, a 15-person agency about $200,000 and a 30-person agency about $410,000. Owners usually underestimate because they leave out some of 8 hidden costs: employer taxes, benefits, the full software stack, recruitment, ramp time, failed hires, professional services and bad debt. Promethean Research's 2026 Digital Agency Industry Report puts the average agency net margin for 2025 at 13%, so roughly 87 cents of every revenue dollar goes out again as cost.
Most "cost of running an agency" content shows a P&L that adds up too neatly. Real agency P&Ls are messier. This post builds an example P&L at three sizes, states every assumption so you can swap in your own numbers, and lists the costs owners most often miss.
Quick-scan summary
- 5-person agency: about $63K a month in total cost. Break-even revenue about $63K; about $74K for a 15% net margin.
- 15-person agency: about $200K a month. About $236K for a 15% net margin.
- 30-person agency: about $410K a month. About $483K for a 15% net margin.
- The 8 hidden costs: employer payroll taxes, benefits, the full software stack, recruitment, training and ramp time, failed hires, professional services and a bad-debt allowance.
- Industry net margin: 13% on average in 2025, and 30% for agencies that narrowed their services (Promethean Research, 2026).
- The biggest lever is price, not cost. Two agencies with the same cost base can earn very different margins because they charge differently.
These are illustrative models, not survey data. Salaries vary widely by city, discipline and seniority; replace them with your own.
How to read an agency P&L
| Category | Typical share of revenue | What is in it |
|---|---|---|
| Revenue | 100% | Retainers, projects, performance bonuses |
| Direct labor (cost of delivery) | 35-50% | Salaries of people doing client work, plus billable contractors |
| Gross profit | 50-65% | Revenue minus direct labor |
| Operating expenses | 35-55% | Everything else: non-billable staff, software, rent, marketing, admin |
| Net profit (pre-tax) | What is left | Usually in the single digits to the twenties; the 2025 industry average after-tax net margin was 13% (Promethean Research, 2026). See the profit margins guide |
The usual trap is treating salary as the whole labor cost. Payroll taxes, benefits, equipment and software add roughly 30-40% on top. An $80,000 developer costs the business something like $105,000 to $115,000 a year in the US.
5-person agency: example P&L
Assumes a founder, a senior strategist, two specialists and a project coordinator. US-based, mid-cost market. Salaries are loaded by 30% for payroll taxes and benefits.
| Category | Monthly cost | Notes |
|---|---|---|
| DIRECT LABOR (BILLABLE) | ||
| Senior strategist | $14,600 | $135K/yr + 30% load |
| 2 specialists | $17,300 | $80K/yr each + 30% load |
| Direct labor subtotal | $31,900 | |
| OPERATING EXPENSES | ||
| Founder (75% allocated to operations) | $10,600 | $130K/yr + 30% load, 75% share |
| Project coordinator | $8,100 | $75K/yr + 30% load |
| Software stack | $1,200 | Project management, billing, CRM, design, communication |
| Real estate (co-working) | $1,500 | Or $0-$500 home-office stipends if remote |
| Marketing and business development | $4,000 | Website, content, paid, events |
| Insurance (E&O, general liability, cyber) | $800 | |
| Professional services (legal, accounting) | $1,500 | |
| Recruitment (amortized) | $500 | About one hire a year |
| Training and development | $400 | Courses, books, conferences |
| Bad-debt reserve | $1,400 | About 2% of revenue |
| Equipment (amortized) | $300 | Laptops, monitors |
| Other (payment processing, banking) | $600 | |
| Operating expenses subtotal | $30,900 | |
| TOTAL MONTHLY COST | $62,800 |
Break-even: about $63K a month. 15% net margin: about $74K. 25% net margin: about $84K.
15-person agency: example P&L
Assumes a founder, a senior delivery lead, 2 account directors, 3 senior specialists, 6 specialists, a project manager and a finance/operations person. Same 30% load.
| Category | Monthly cost | Notes |
|---|---|---|
| DIRECT LABOR | ||
| Senior delivery lead | $20,000 | $185K/yr + load |
| 2 account directors | $26,000 | $120K/yr each + load |
| 3 senior specialists | $36,700 | $113K/yr each + load |
| 6 specialists | $50,700 | $78K/yr each + load |
| Direct labor subtotal | $133,400 | |
| OPERATING EXPENSES | ||
| Founder (75% allocated to operations) | $12,200 | $150K/yr + load, 75% share |
| Project manager | $9,200 | $85K/yr + load |
| Finance / operations | $8,700 | $80K/yr + load |
| Software stack | $4,500 | About $300 per person per month |
| Real estate | $4,500 | Small office, or $0 if fully remote |
| Marketing and business development | $9,000 | Includes an outsourced retainer or part-time hire |
| Insurance (E&O, GL, cyber, D&O) | $2,200 | |
| Professional services | $3,500 | Legal, accounting, fractional CFO |
| Recruitment (amortized) | $2,500 | Several hires a year |
| Training and development | $1,800 | |
| Bad-debt reserve | $4,500 | About 2% of revenue |
| Equipment and tech | $1,200 | |
| Internal events | $1,500 | Offsites, team events |
| Other | $1,500 | |
| Operating expenses subtotal | $66,800 | |
| TOTAL MONTHLY COST | $200,200 |
Break-even: about $200K a month. 15% net margin: about $236K. 25% net margin: about $267K.
30-person agency: example P&L
Assumes a founder/CEO, a head of delivery, 3 account directors, 4 senior specialists, 12 specialists, 3 project managers, a finance lead, a people/HR lead, a new-business lead, a marketer and an operations assistant. Same 30% load.
| Category | Monthly cost | Notes |
|---|---|---|
| DIRECT LABOR | ||
| Head of delivery | $24,900 | $230K/yr + load |
| 3 account directors | $39,000 | $120K/yr each + load |
| 4 senior specialists | $49,000 | $113K/yr each + load |
| 12 specialists | $101,400 | $78K/yr each + load |
| Direct labor subtotal | $214,300 | |
| OPERATING EXPENSES | ||
| Founder/CEO | $23,800 | $220K/yr + load |
| 3 project managers | $27,600 | $85K/yr each + load |
| Finance lead | $14,600 | $135K/yr + load |
| People/HR | $12,500 | $115K/yr + load |
| New business | $15,200 | $140K/yr + load (or a commission structure) |
| Marketer | $10,800 | $100K/yr + load |
| Operations assistant | $7,000 | $65K/yr + load |
| Software stack | $11,000 | About $360 per person per month |
| Real estate | $11,000 | An office at this size, if you keep one |
| Marketing and business development spend | $18,000 | Content, paid, events, sponsorships |
| Insurance | $5,500 | Including D&O |
| Professional services | $7,500 | Legal, accounting, part-time CFO |
| Recruitment | $7,500 | Ongoing hiring |
| Training and development | $4,500 | |
| Bad-debt reserve | $9,500 | About 2% of revenue |
| Equipment and tech | $3,500 | |
| Internal events | $3,500 | Quarterly offsites |
| Other | $3,000 | |
| Operating expenses subtotal | $196,000 | |
| TOTAL MONTHLY COST | $410,300 |
Break-even: about $410K a month. 15% net margin: about $483K. 25% net margin: about $547K.
At this size, the agencies with strong margins usually have pricing power: a specialist niche, premium strategy work or a productized offer with high retention.
The 8 hidden costs most owners miss
1. Employer payroll taxes (US). Social Security and Medicare (7.65% of wages under FICA), plus federal and state unemployment taxes and any state-specific taxes. Budget roughly 8-12% on top of salary, depending on the state.
2. Benefits. Health, dental and vision insurance, retirement match, life and disability insurance. Often 15-25% on top of salary, and a common surprise for new owners.
3. The full software stack. Not just the tools you use daily: forgotten per-seat licenses, security and password tools, backups, design software, AI tools. Audit it every quarter.
4. Recruitment. Job board posts, recruiter fees if you use one (often a percentage of first-year salary), and interviewing time from senior staff. A senior hire through a recruiter can cost tens of thousands of dollars.
5. Training and ramp-up. New hires are not fully productive for the first few months. The gap between what you pay them and what they deliver during that time is a real cost.
6. Failed hires. When a senior hire does not work out, you pay for recruitment, months of reduced output, possibly severance, and then recruitment again. Keep a reserve for it.
7. Professional services. Legal (master agreements, employment, IP, disputes), accounting (monthly close, tax), and a fractional CFO as you grow.
8. Bad debt. Some revenue is never collected: late or non-paying clients, disputed invoices settled below full value, refunds. Put an allowance on the P&L so it does not surprise you. Our guide to handling late-paying clients covers how to keep it small.
What agencies tend to underspend on
Operational software. Cutting tools to save a few hundred dollars a month can cost far more in manual work: copying hours into invoices, chasing approvals over email, building reports by hand.
Senior hires. Hiring a senior person months after the work needed them costs revenue that never arrives. Model when the hire pays for itself instead of waiting until everyone is overloaded.
New business and marketing. Growth-stage agencies that rely only on referrals often stall when referrals dip. If you want to grow, budget for business development deliberately and track what it produces.
When this breakdown is not for you
- Solo consultants. Your P&L is you plus a few tools; the math is different.
- 50+ person agencies. More layers, more overhead and different software needs. Work with a CFO.
- Agencies outside the US. Payroll taxes, healthcare and labor rules change the numbers. Use this as a structure, not as figures.
It is for you if you run a 3-40 person US agency and want a realistic picture of where your money goes.
Frequently asked questions
How much does it cost to run a 10-person agency?
Using the same assumptions as the models above (US mid-cost city, 30% load on salaries), roughly $130,000 a month for about 10 people plus software, modest rent, marketing, insurance, professional services and reserves. You would need about $153,000 a month in revenue for a 15% net margin. Your number depends mostly on salaries and seniority mix.
What are the main types of agency costs?
Direct labor (the people who do billable client work), operating expenses (non-billable staff, software, rent, marketing, insurance, professional services) and capital expenditures (equipment and other one-time purchases). Direct labor usually runs 35-50% of revenue and operating expenses 35-55%. What is left is net margin, which averaged 13% across agencies in 2025 (Promethean Research, 2026).
What is the average net profit margin for agencies?
Promethean Research's 2026 Digital Agency Industry Report puts the 2025 average at 13%, against a long-run average of about 15% since 2015. It varies widely by specialism, size and pricing: agencies that narrowed their services averaged 30%. Agencies with a clear niche and strong pricing tend to earn more than generalists. Margins under 10% usually signal pricing that is too low, scope creep or costs missing from the P&L. The agency profit margins guide covers benchmarks and how to improve them.
How much does it cost to start an agency?
For a solo founder in the US, initial costs are mostly legal formation, a website, software and professional advice, often a few thousand dollars to around $15,000. Then plan for several months of living and operating costs before revenue is steady. If you hire before revenue, add the fully loaded labor cost (salary plus 30-40%).
What software does an agency need?
Project management, billing and invoicing, a CRM or leads pipeline, time tracking, a client portal, accounting and team communication. Some platforms combine several of these. For example, AgencyPro combines the client portal, project management, invoicing and messaging on every plan, and adds time tracking and a leads pipeline on Pro. A 15-person team on Pro costs $79 + 14 x $20 = $359 a month. You still need accounting software alongside it.
How much should I budget for new business and marketing?
Enough to produce the pipeline your growth plan needs. Work backwards: how many new clients you need, your win rate, and how many qualified opportunities that requires. Then budget for the content, events, paid campaigns and people that produce those opportunities, and measure the cost per new client.
What does a bad hire cost an agency?
Recruitment, salary paid during months of underperformance, any severance, a second round of recruitment and the replacement's ramp-up time. For a senior role this can easily add up to more than half a year's salary. Careful hiring and a structured first 90 days reduce the risk.
What to do next
- Rebuild your P&L with all 8 hidden cost categories.
- Work out your true cost per person (salary plus 30-40% load).
- Calculate your break-even revenue and your revenue for a 15% and 25% margin.
- Compare those with your actual revenue and decide which lever (pricing, headcount or costs) to pull.
- Read the agency cash flow management guide for the cash side.
- If you want projects, time, invoicing and the client portal in one system, book a demo of AgencyPro.
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