Your P&L Is Lying to You — Here’s How to Read It Properly

Most agency owners look at their P&L once a month.

They scroll to the bottom, see a number, think “yeah that looks about right”… and close it.

That’s not managing your finances. That’s hoping for the best with extra steps.

I’ve sat with agency owners doing £600k in revenue who couldn’t tell me their gross margin. Couldn’t tell me which service line was actually profitable. Couldn’t tell me whether they were making more or less money than six months ago.

The P&L was there every month.

They just didn’t know what they were looking at.

So here’s the actual guide — how to read a profit and loss statement - no jargon, no waffle. Just what matters, what doesn’t, and what to do about it.

Revenue is Vanity. Margin is Sanity.

Keep that in your head as you read this.

What a P&L Actually Tells You

A Profit & Loss statement is a record of what your business earned and what it spent over a set period.

It has three sections:

• Revenue — money in

• Cost of Sales (COGS) — what it costs to deliver your work

• Operating Expenses (OpEx) — everything else

  
  

Revenue minus costs equals profit.

Simple. But only useful if you look at the right things.

The Number Everyone Focuses On — And Why It’s Misleading

Turnover. Revenue. Top line.

“We’re doing £500k.”

On its own, it means nothing.

I’ve seen agencies doing £320k take home more than agencies doing £600k.

Why?

Because one is built properly.

The other is just busy.

The Numbers That Actually Matter

What “Healthy” Looks Like

• Gross Profit Margin: 50–65%+

• Warning Zone: Below 40%

• Net Profit Margin: 20–30%

• Danger Zone: Below 10%

  
  

1. Gross Profit Margin

This is the most important number in your business.

It tells you how much you keep after delivering the work.

Formula:

(Revenue − Cost of Sales) ÷ Revenue × 100

Example:

• Revenue: £400k

• Cost of Sales: £180k

• Gross Profit: £220k

• Gross Margin: 55% (healthy)
  

Now imagine:

• Cost of Sales rises to £260k

• Gross Margin drops to 35%
  

That’s a problem — and you haven’t even paid overhead yet.

2. Net Profit Margin

This is what’s left after everything:

• Rent

• Subscriptions

• Marketing

• Salaries

• Accountancy
  

If your net margin is:

• Below 15% → no buffer

• Below 10% → you’re effectively breaking even
  

3. Director Pay — The Hidden Problem

This is where most agency owners get caught out.

If you pay yourself via dividends, it often doesn’t show in your P&L.

Which means your profit looks better than it actually is.

Example:

• Reported profit: £80k

• Dividends taken: £60k
  

Real profit: £20k

That’s a completely different business.

4. Revenue by Service Line

Your P&L shows total revenue.

It doesn’t automatically show what each service makes.

And that’s where problems hide.

I’ve seen:

• One service at 60% margin

• Another at 18% margin

  
  

Combined? Looks fine.

Separately? One is dragging the whole business down.

Also — your “best” clients often aren’t your most profitable.

• The easy, long-term client → usually high margin

• The demanding big-name client → often low margin

  
  

5. Month-on-Month Trends

Don’t look at one month.

Look at the last 3–6 months and ask:

• Is revenue growing?

• Is gross margin holding or improving?

• Is net margin holding or improving?

  
  

What This Actually Means

• Revenue up + margin down → you’re scaling a problem

• Revenue flat + margin up → you’re getting more efficient

  
  

Efficiency wins long-term.

What to Ignore

Don’t overreact to:

• One bad month — seasonality is normal

• Depreciation — mostly accounting noise for service businesses

• Standalone numbers — trends matter more

  
  

The One Question That Matters

After reviewing your P&L, ask:

“If I remove anything unusual — is this business more or less profitable than it was three months ago?”

That’s the real test.

What to Do This Week

1. Check Your Gross Margin

Open your last 3 months of P&Ls.

Calculate your gross margin for each.

Is it:

• Improving

• Flat

• Dropping
  

2. Check How You Pay Yourself

If dividends aren’t included anywhere:

Your profit figure is wrong.

Work out your real number.

3. Find Your Least Profitable Client

Not the smallest.

The least profitable.

Look at:

• Time

• Amends

• Calls

• Effort

  
  

Then ask:

Is this actually worth it?

Final Thought

Your P&L isn’t just an accounting document.

It’s the clearest picture of whether your business is actually working.

Most agency owners aren’t looking at it properly.

Now you are.

Want Help Understanding Your Numbers?

If you want clarity on your margins, pricing, and profitability:

👉 Book a call and we’ll walk through it with you

Coming Next:

The Pricing Edition-How to price properly so your margin doesn’t collapse when you hire.