If you run a small advertising firm, there is a single financial figure that reveals more about your health than any revenue report ever could. That figure is your Adjusted Gross Income, or AGI. Unlike gross billings, which include every dollar that passes through your bank account, AGI strips away the money that was never really yours and shows you what is left to pay salaries, cover overhead, and generate profit. In this guide you will learn exactly how to calculate AGI, compare it against industry benchmarks, and take targeted action to raise it quarter after quarter.
What Is Agency AGI (and Why It Is Not a Tax Term)
In tax contexts, Adjusted Gross Income is your total taxable income minus above-the-line deductions on IRS Form 1040. Agency AGI is a completely different concept. Agency AGI is your gross billings minus all Cost of Goods Sold (COGS), representing the revenue that actually belongs to your firm.
COGS in an agency setting includes media buys placed on behalf of clients, outsourced production, freelance contractors, and any other pass-through expense. As Drew McLellan of Agency Management Institute explains, everything else is money you are merely holding as a bank for your clients.
Why Gross Revenue Misleads
A firm billing $2 million a year with $800,000 in pass-throughs has a very different financial reality from one billing $1.4 million with only $200,000 in COGS. Both agencies share $1.2 million in AGI, yet the first looks larger on paper. Decision-making based on gross billings alone leads to overstaffing, under-pricing, and thin margins.
The Three-Line AGI Formula
Calculating your agency AGI takes three lines and about thirty minutes with clean books:
- Sum gross billings. Pull every dollar invoiced to clients during the period. Include retainers, project fees, media commissions, and markup revenue.
- Isolate pass-throughs. Tag every expense you purchased strictly to fulfill client work: media placements, printing, stock photography licenses, subcontracted development, and freelance creative labor.
- Subtract. Gross Billings minus Pass-Throughs equals your AGI.
Cost of Goods Sold (COGS) is the total of all pass-through expenses your agency incurs on behalf of clients. If you are unsure whether a line item counts, ask one question: "Would this expense exist if this client did not exist?" If yes, it is a pass-through.
AGI per FTE: The Benchmark That Tells the Truth
Once you know your AGI, divide it by your total number of full-time equivalents (FTEs). FTE count includes the owner. AMI advises that agencies should target $150,000 of AGI per FTE. Agencies in AMI peer networks average roughly $135,000, while the broader industry often sits near $100,000 to $110,000.
AGI per FTE is a staffing efficiency ratio that tells you whether your team size matches the revenue you retain. If the number drops below $130,000, profit margins compress quickly, leaving little for reinvestment, bonuses, or the owner's take-home pay. Learn more about this metric in AMI's five key agency metrics overview.
Diagnostic Table: Where Does Your Agency Stand?
| AGI per FTE | Health Rating | Likely Symptoms |
|---|---|---|
| $150,000+ | Strong | Healthy margins, capacity for raises and reinvestment |
| $130,000 – $149,999 | Stable | Comfortable but limited room for error |
| $100,000 – $129,999 | At Risk | Owner underpaid, no profit cushion, deferred investments |
| Below $100,000 | Critical | Cash-flow stress, potential layoffs, unsustainable workload |
This table is derived from benchmarks shared across AMI's AGI per FTE training video and peer network data.
Five Operational Levers to Lift AGI
1. Renegotiate or Internalize Freelance Work
Freelance spend that balloons beyond 20% of gross billings is a direct drag on AGI. Evaluate your top three freelance categories. If a single skill is used on most accounts, bringing that role in-house converts a COGS line item into a salaried position, and the revenue it produces stays inside your AGI. AMI's Money Matters workshop walks owners through this exact cost-benefit analysis.
2. Set a Minimum Client AGI Threshold
Small clients consume disproportionate project management time. Review every account's annual AGI contribution and set a floor. Some AMI agencies set that floor at $5,000 per year; others at $250,000. The right number depends on your capacity, but having no floor guarantees margin-diluting work.
3. Shift to Value-Based or Retainer Pricing
Hourly billing punishes efficiency. When your team gets faster, you earn less. Retainer and value-based models let you capture the upside of expertise. Document the outcomes your work produces, then price against the value delivered, not the hours logged.
4. Reduce Scope Creep With Tighter SOWs
Scope creep is unbilled labor, which means hours that cost money but never appear on an invoice. A disciplined statement of work with explicit deliverables, revision limits, and change-order clauses protects AGI from invisible erosion. Listen to agency operations strategies on the Build a Better Agency podcast for real-world examples.
5. Track Billable Utilization Weekly
If you do not know how many billable hours each team member logs per week, you cannot diagnose AGI problems. Target 60% to 70% billable utilization for production staff. Anything below that signals either poor project flow, misaligned roles, or chronic over-servicing.
Common Mistakes That Silently Erode AGI
Many agency owners unknowingly shrink their AGI through habits that feel productive. Here are three to watch for:
- Writing off time instead of renegotiating scope. Every written-off hour is revenue you earned but chose not to collect. A pattern of write-offs signals pricing or scoping failures, not generosity.
- Treating all revenue growth as progress. Adding a $500,000 client that brings $400,000 in pass-throughs only adds $100,000 to your AGI while dramatically increasing your operational complexity.
- Ignoring the owner's FTE slot. If you exclude yourself from the FTE count, the ratio looks artificially healthy. Always include yourself.
Key Takeaways
- Agency AGI equals gross billings minus all cost of goods sold, and it represents the money your firm actually keeps.
- Do not confuse agency AGI with the IRS definition of Adjusted Gross Income on personal tax returns.
- The gold-standard benchmark is $150,000 of AGI per full-time equivalent employee, including the owner.
- Agencies below $130,000 AGI per FTE typically struggle with thin margins and deferred investment.
- Internalizing high-volume freelance work is one of the fastest ways to shift dollars from COGS into retained AGI.
- Setting a minimum client AGI threshold prevents small accounts from consuming outsized resources.
- Weekly billable utilization tracking surfaces problems before they show up on a quarterly P&L.
Frequently Asked Questions
What is the difference between agency AGI and IRS AGI?
Agency AGI measures the revenue an advertising or marketing firm retains after subtracting pass-through costs like media buys and freelancers. IRS AGI is your total taxable income minus specific above-the-line deductions on your personal or business tax return. They share an acronym but measure entirely different things.
How often should I calculate agency AGI?
At minimum, calculate it quarterly. Many well-run agencies review AGI monthly so they can spot trends, like rising freelance costs or declining retainer revenue, before those trends become crises.
What counts as a pass-through or COGS expense?
Any cost incurred solely to deliver a specific client project qualifies. Common examples include media placements, outsourced development, printing, stock assets, and freelance contractors hired for a particular account.
What is a healthy AGI per FTE ratio for a small agency?
AMI recommends targeting $150,000 of AGI per FTE. Agencies at $135,000 or above are in a comfortable zone. Falling below $100,000 per FTE is a red flag indicating overstaffing or under-pricing.
Can improving AGI actually lower my tax bill?
Improving agency AGI is an operational efficiency play, not a direct tax strategy. However, a stronger AGI often means better cash flow, which gives you more flexibility to make tax-advantaged moves like maximizing retirement contributions or investing in equipment before year-end.
Should the agency owner be counted in the FTE calculation?
Yes. Excluding the owner inflates the AGI-per-FTE ratio and masks the true cost of running the agency. Always include every person who works at least 30 hours a week, owner included.
How do I know if a client is hurting my AGI?
Build a simple spreadsheet listing each client's gross billings, pass-throughs, and resulting AGI. Then compare the AGI each client generates against the staff hours it consumes. Clients with low AGI and high hour demands are margin destroyers.
Where can I learn more about agency financial management?
AMI offers a dedicated Money Matters workshop for agency owners and financial leaders, as well as peer network memberships where owners share financials and benchmark against one another in a confidential setting.
Your Next Step
Open your books today and run the three-line formula. If your AGI per FTE falls below $130,000, explore AMI's owner peer networks to get confidential, real-world guidance from agency owners who have already solved the same problem. Your revenue may look fine on paper, but only AGI tells you the truth.