I Built the Wrong Tool for My Teammate. Your P&L might be doing the same thing to you.

I built a bowling tracking app for my teammate. Captured every metric I cared about. Technically sound. Looked great.

He stopped using it after two weeks.

Here’s why: I built it for me. A CPA obsessed with data and precision. Which is great, if you’re me. He’s not me. So the tool told him everything I wanted to know and almost nothing he actually needed.

Classic product-market mismatch. Except it wasn’t a product. It was a favor. (Funny how that makes it worse.)

I’ve been thinking about that story a lot lately because I see the same thing happen with financials all the time. Specifically, with cash-basis accounting.Cash Basis: The Tool You Built for Yourself

Here’s how most consulting shops, agencies, and professional services firms end up on cash basis: it’s simple, it’s intuitive, and your bookkeeper or early-stage CPA probably set it up that way without much conversation about it.

Cash in. Cash out. Money hits the account, you record it. Money leaves the account, you record it. Easy.

And honestly? For a lot of early-stage businesses, it’s fine. When you’re just trying to survive, tracking cash is survival.

But here’s the problem. At some point, your business got more complex. You started doing longer engagements. You started billing in chunks: retainers up front, milestones mid-project, final invoices on completion. You started carrying real expenses that don’t line up neatly with when revenue hits.

And your cash basis P&L kept telling you the same simple story. Cash in. Cash out.

That story stopped being true a while ago. You just didn’t notice because the tool felt familiar.

What Cash Basis Is Actually Hiding

Let me give you a concrete example. (I love a concrete example. I did say I’m a data guy.)

Say you land a big consulting engagement in December. The client pays a $30,000 retainer up front. Under cash basis, that $30,000 hits your December P&L. December looks amazing. You feel great. Maybe you make some decisions based on that — hire someone, buy something, take a distribution.

But here’s the thing: you haven’t done the work yet. That $30,000 isn’t profit. It’s an obligation. You owe your client three months of work starting in January.

Cash basis doesn’t know that. It just saw money come in and called it a win.

Now flip it. You do six weeks of work for a client in November and December. You invoice them in January. Under cash basis, November and December look lean — even though you were fully utilized and delivering real value. January looks great — even though you’re already onto the next thing.

Your P&L is lying to you. Not maliciously. Just because you’re using a tool that wasn’t built for the way your business actually works.

Accrual: The Tool Built for Your Business

Accrual accounting fixes this. (it’s not as complicated as it sounds, I promise.)

The core idea is simple: you record revenue when you earn it, not when you collect it. You record expenses when you incur them, not when you pay them.

That $30,000 retainer? Under accrual, it sits on your balance sheet as deferred revenue — a liability — until you do the work. As you deliver, it moves into revenue. Your P&L reflects what you actually did, not just what hit your bank account.

The six weeks of November/December work? Accrual puts that revenue in the period you earned it, even if the invoice goes out in January. Your P&L tells the real story of how busy and productive you actually were.

This matters for a few reasons:

You make better decisions. If your December looks artificially great because of a big retainer, you might overspend or over-hire going into Q1. Accrual keeps you honest.

You understand your real profitability. Cash basis can hide the fact that certain engagements or certain clients are actually unprofitable once you match their revenue against the real cost of serving them.

You can plan. Cash basis is a rearview mirror. Accrual gives you something closer to a windshield. When you know what you’ve earned vs. what you’ve collected, you can see what’s coming — and plan around it.

The Question I Should Have Asked My Teammate

Before I built my teammate’s tool, I should have asked him three questions:

– What do you actually want to know during a match?

– What would you check if it took five seconds?

– What would you ignore, no matter how useful I thought it was?

I skipped those. Because I already knew what good looked like.

The equivalent questions for your financials are:

– What decisions are you actually trying to make with your P&L?

– What would you check every month if it was easy to read?

– What are you currently ignoring because the numbers don’t quite make sense?

If your answers to those questions don’t line up with what your current accounting method is giving you — that’s worth paying attention to.

So, Do You Need to Switch?

Maybe. Maybe not. Here’s my honest take:

If you’re a solo practitioner or very early stage with simple, transactional revenue — cash basis is probably fine. Don’t overcomplicate it.

If you’re running multi-person engagements, billing on retainers or milestones, carrying real overhead, or trying to make growth decisions based on your financials — you probably need accrual. Or at minimum, you need someone who can help you understand what your cash basis numbers are hiding.

The goal isn’t to make your accounting more complicated. The goal is to make sure your financial tools are actually built for your business — not for the version of your business that existed three years ago.

My teammate deserves a tool that tells him what he needs to know. So do you.

Chris Geno is a CPA and fractional controller and CFO advisor at High Rock Accounting. He works with professional services firms on financial strategy, reporting, and operations – and is slowly building a better bowling app.