HOW TO READ YOUR AGENCY'S P&L LIKE A CFO (WHY YOUR NUMBERS SOMETIMES LIE TO YOU)
I've sat on more than one call where a founder was genuinely alarmed—certain their profit had cratered, ready to make a snap decision about cutting costs or pausing a hire—and the entire "crisis" turned out to be a formula error in a spreadsheet. The business hadn't changed at all. The number describing it had just gone wrong.
That happens more than you'd think, and it's rarely because anyone's careless. It's because a P&L can be technically accurate and still tell you something misleading, if you don't know what you're looking at.
Quick answer: before you react to a scary number, rule out three things: a cash vs. accrual timing mismatch, a tagging or categorization error, and a one-time item that isn't actually part of your ongoing run rate. Most "we're suddenly unprofitable" panics are one of these three, not a real change in the business.
CASH BASIS VS. ACCRUAL: THE MOST COMMON FALSE ALARM
If your books are on a cash basis, revenue shows up when you're paid, not when you earn it. That means a month where you did plenty of great, billable work—but a big client hasn't paid yet—can show up as a "zero revenue month" on paper, even though the work (and the eventual pay) is completely real.
Accrual accounting fixes this by recognizing revenue when it's earned, not when cash arrives, which usually gives a truer read on how the business is actually performing month to month. Cash basis still matters for knowing what's actually in the bank—you need both views, not one instead of the other. The mistake is looking at only one and assuming it's telling you the whole story.
TAGGING ERRORS: SMALL MISTAKES, BIG FALSE SIGNALS
A single mis-categorized expense or a broken formula in a spreadsheet can make a perfectly healthy month look like a disaster—or hide a real problem behind a number that looks fine. This is especially common with anything tracked manually alongside QuickBooks or FreshBooks, because those tools don't always preserve custom categorization (like which revenue is new business vs. existing) cleanly over time.
Before treating any swing as real, check the boring explanation first: was something categorized wrong, duplicated, or dropped. It's not the exciting answer, but it's the correct one more often than founders expect.
ONE-TIME ITEMS: DON'T LET A SINGLE MONTH SET YOUR BASELINE
A big one-time expense—a legal bill, a major software migration, a one-off contractor project—can make a single month look far worse than your actual run rate. The opposite happens too: a one-time refund or a late invoice finally clearing can make a month look better than it will repeat. Either way, judging your agency's health off one month, instead of a rolling three-month trend, will mislead you almost every time.
THE FIVE LINES ACTUALLY WORTH YOUR ATTENTION
Once you've ruled out the false alarms above, here's what a CFO is actually reading on your P&L, roughly in order:
Revenue, split by new vs. existing. A growing top line built entirely on new business is a different (riskier) story than one built on expanding existing accounts. More in New Business vs. Existing Revenue.
Gross margin before overhead. What's left after the direct cost of delivering the work—before rent, software, and admin—tells you if the service itself is priced right.
Total labor cost as a percentage of revenue. Covered in depth in What's a Good Profit Margin (and Labor Cost Ratio) — the ceiling to watch is 60%.
Net profit margin, on a trailing three-month basis. One good or bad month is noise. Three months is a trend.
Cash position relative to upcoming payroll. Profitable on paper and cash-poor in the bank account can both be true at once—see Get a Line of Credit Before You Need One.
FAQ
Why does my P&L show a loss when I know we had a good month? Check whether you're on cash or accrual accounting first—a cash-basis P&L can show a "bad" month simply because a client hasn't paid yet, even though the work and revenue are real.
How often should I actually review my P&L? Monthly at minimum, with real attention to the trailing three-month trend rather than any single month in isolation—one month tells you very little on its own.
What's the difference between revenue and profit, really? Revenue is everything that came in. Profit is what's left after every cost of running the business. An agency can grow revenue every year and still take home less, if costs are growing faster—which is why margin matters more than the top-line number.
Do I need accounting software to do this, or is a spreadsheet enough? QuickBooks Online or FreshBooks will get your books accurate. Reading them like a CFO usually takes a purpose-built forecasting layer on top, since neither tool is designed to answer "what should I do about this" on its own.
If your numbers have ever left you more confused than informed, a custom P&L and forecasting tool is exactly what we build with every Le Chéile client.
About the Author Meredith Fennessy Witts
Founder & Strategic Growth Advisor at Le Chéile and Co-Host of
With a background in financial and operational consulting and a successful track record of founding and scaling her own agency, Meredith brings deep expertise in strategic growth for indie creative and digital agencies.
Her company, Le Chéile, helps agencies scaling toward and beyond 5M+ in revenue to rightsize teams and payroll, increase founder pay, scale offers and packages and more. She helps clients to achieve their goals while clarifying their business strategy and finances.
She is a trusted authority on building mindful, profitable businesses—especially for underserved founders in the women, LGBTQ+, and BIPOC communities.
Beyond Le Chéile, Meredith co-hosts , a podcast for creative agency founders, and its companion . She also runs , a community for fractionals and consultants in the agency space.
View full bio and connect with her on or listen to her podcast, .