8 Things a Good CPA Does That You Don't Know About

8 Things a Good CPA Does That You Don't Know About

Your CPA files your taxes once a year and sends you a bill. A good CPA stops you from lighting money on fire before the audit even starts.

The difference isn't subtle. It's the difference between someone who processes paperwork and someone who actually runs your numbers like they own the place. If you're a founder, you need the second one.

Chances are, your current CPA does almost none of what's below. That's not their fault—most CPAs work reactive, not proactive. But it's costing you. Here's what separates them.

1. They Flag Zombie Subscriptions Killing Your Burn Rate

You signed up for a design tool in Q2 of last year. Paid the first month. Never used it again. The credit card got charged 11 more times.

You didn't notice. Your CFO didn't notice. Your CPA probably won't mention it either—unless they're the proactive kind. A proactive CPA runs your monthly bank statements against your books and spots patterns. That design tool. The Slack workspace you killed six months ago. The analytics platform you replaced. They flag all of it.

This isn't glamorous work. It's the opposite of glamorous. It's also how you find 3–5% of burn rate you didn't know you were bleeding.

2. They Tell You When Your Labor Ratio Is Breaking Before You Feel It

You know payroll as a percentage of revenue matters. But you don't run the math every month. Your CPA definitely doesn't unless you ask.

A proactive CPA is watching when that number drifts. When you hire the third engineer and payroll ticks up 18% but revenue only grows 8%, they bring it to the table. Not as a judgment call. As a factual alert: "This ratio has moved. We need to talk about margin."

Catching this three months early instead of in your annual review is worth paying their retainer.

3. They Cross-Check Your Bank Statements Against Your Books for Discrepancies

Reconciliation sounds boring. And most CPAs treat it that way. But a proactive CPA doesn't just reconcile—they investigate when the pattern is off.

Why did a $12K invoice get recorded but the money never hit the account? Why does your bank show a wire out that doesn't match any entry in the books? These aren't always errors. Sometimes they're early signals of fraud, double-billing, or customer disputes you didn't know existed.

You'd catch these eventually. A proactive CPA catches them first, in real time.

4. They Alert You When an S-Corp Election Would Actually Move Your Net Take-Home

Every CPA knows S-corp taxation is an option. Almost none of them bring it up proactively to the founders paying them.

A good CPA runs the numbers every year. They know your revenue, your planned distributions, and your effective tax rate. When switching to S-corp saves you $30K in self-employment taxes, they schedule a call. Not in December. In March, when you can actually plan around it.

If your CPA has never had this conversation with you unprompted, you know where you stand.

5. They Treat Monthly Closes as Conversations, Not Inbox Drops

Bad pattern: CPA sends you a monthly P&L as a PDF. You glance at it. Money went in, money went out. Nothing to see here.

Better pattern: A proactive CPA sends the same P&L with context. "Revenue dipped 7% month-over-month, driven by three customers pushing payment into next month. Your OpEx stayed flat, but COGS spiked 12% because of higher shipping costs. Here's what to watch."

Context matters. A CPA who treats the close as a data dump isn't your advisor. They're a bookkeeper wearing a fancier title. Your actual CPA goes beyond taxes and talks you through what the numbers mean.

6. They Map Your Deductions Before the Year Ends, Not After

Most CPAs work backward. You hand them receipts in January. They file your taxes in March. Any optimization that could have happened in November is gone.

A good CPA is proactive about deductions. In October, they're asking about home office square footage, equipment you're considering buying, and business travel plans. They're running scenarios. "If you buy the server now instead of leasing, here's your tax impact."

This isn't about being aggressive. It's about being intentional.

7. They Connect Your Tax Plan to Your Financial Planning, Not Treat Them Separately

You have a CPA for taxes. Maybe a financial advisor for retirement. They've never talked to each other.

A good CPA sees these as one problem. If you're looking at a $200K year-end bonus, they don't just file it—they ask how it stacks against your quarterly estimated taxes, whether it makes sense to defer, and how it affects your retirement contribution limits.

Most CPAs stay in their lane. Great ones build bridges.

8. They Ask Hard Questions About Your Numbers When Something Doesn't Add Up

Revenue jumped 40% but accounts payable barely moved. Customer acquisition cost dropped, but you're spending more on marketing. These aren't always red flags. But they're always worth asking about.

A CPA who just records what you hand them isn't doing their job. A good one gets curious. They ask. They press gently. Not because they distrust you, but because discrepancies—even innocent ones—are how you catch real problems before they metastasize.

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The point: If your CPA's main contribution is showing up once a year with your tax return, you're leaving money on the table. A proactive CPA is in your business monthly. They see patterns. They ask questions. They flag risk before it becomes a crisis.

That's the gap between a vendor and an advisor. And frankly, it's the gap between CPAs who are your actual CPA and ones who are just processing your paperwork.

A good CPA beyond taxes—one who looks at your numbers with a founder's eye—pays for itself. A $30K tax savings, a year of catching fraud before it metastasizes, a single avoided hiring mistake because payroll ratios told the story. You'd pay double what they charge.

Looking for that CPA? Check samslist.com. We list CPAs across the country who specialize in working with founders and SMBs—the ones who stay in the weeds with you, not just filing your taxes.