Think of your revenue as a pie. Every sector takes a slice — payroll, materials, operating costs. The pie is only so big, so if the pieces are too big, you run out of pie.
What I find is that most owners never cut a slice for themselves. If you're only planning on three pieces, those three will always grow to take everything.
The other common issue: one sector is helping itself to way too big a piece. Usually payroll.
Your service company P&L should be broken into four buckets, not three:
Every week, add these up and compare them to overall sales by percentage. I call this Functional Accounting — four buckets to fit every cost in.
The P&L your accountant hands you won't be built this way, and will likely confuse you. I use this exact formula to buy businesses and figure out what to change immediately to put them back on track.
Four numbers from last month. Estimates are fine — you'll see your buckets the moment you type.
An example of a typical month at a 3-bay auto shop.
Sales of $50,000 and a profit of $14,300. Looks good in QuickBooks — it would make most owners happy. Until you break it into the four buckets.
| Bucket | Actual | Should Be | Over | |
|---|---|---|---|---|
| Labor | $13,200 | $12,500 | +$700 | High |
| Cost of Goods | $12,500 | $12,500 | $0 | Good |
| Operating Costs | $10,000 | $8,500 | +$1,500 | High |
| Profit — Your Slice | $14,300 | $16,500 | −$2,200 |
Now you can see it. Labor should be $12,500 at 25% of sales — it came in at $13,200. That's $700 walking out the door. Operating costs should be $8,500 at 17% — they came in at $10,000. Another $1,500 gone.
$2,200 in one month that QuickBooks called a good month.
In this case the company needs more sales to bring that operating number down. And if this shop was already maxed out on productivity, that's the sign it needs to charge more per hour for its services.
Same numbers. Same month. The only thing that changed is how the pie got cut — and now there's something to actually fix.