Quick answer: If your practice has $500,000+ sitting in a checking account earning near 0%, inflation is eroding roughly $20,000–$30,000 per year in real purchasing power. That's money that disappears silently — no line item, no invoice, no write-off. Just less buying power every month. Moving excess cash to a high-yield money market takes one phone call and earns $16,000–$25,000/year in interest with zero additional work.

The Invisible Tax on Successful Practices

Here's a financial problem nobody talks about in healthcare: what happens when the practice is doing well.

Not the cash flow crunch — everyone talks about that. Not the collections problem or the insurance reimbursement lag. The quiet, invisible problem that only hits practices that have done everything right.

You built a profitable practice. You paid off your debt. You kept expenses in check. You accumulated cash. And now you have $500,000–$800,000 sitting in a business checking account at PNC or Wells Fargo or Chase, earning 0.01% interest.

Meanwhile, inflation is running at 3.5–4%. That means every dollar you have is worth about 4 cents less at the end of the year than it was at the beginning.

On $700,000, that's roughly $28,000 per year in lost purchasing power. Over five years, that compounds to over $140,000.

There's no journal entry for it. Your P&L doesn't show it. Your bank statement doesn't flag it. It just happens — quietly, every day, to every dollar that's sitting still.

Key Takeaway: A practice with $500K+ in a checking account earning 0.01% loses $20,000-$29,000/year to inflation — with no line item, no invoice, and no write-off. Moving excess cash to a high-yield money market takes one phone call and earns $20,000-$25,000/year in risk-free interest. Keep 2-3 months of operating expenses in checking. Deploy the rest.

A Real Practice, Real Numbers

A veterinary practice we recently analyzed had the following cash position:

The practice was doing $1.6M in annual revenue with about $70,000/month in operating expenses. That means $736,000 in cash represented roughly 10.5 months of operating expenses sitting in the bank.

How much does a practice this size actually need in liquid reserves? Two to three months of operating expenses — $140,000 to $210,000. That's enough to cover payroll, rent, and supplies through any reasonable disruption.

The remaining $525,000–$595,000? It was doing nothing. Earning a fraction of a percent while losing real value every day.

The owner knew this, intuitively. In January 2026, she moved $120,000 into a Fidelity investment account — a good step. But it was late, and it was only a fraction of the idle capital.

Why Practice Owners Let Cash Sit (And Why It's Not Laziness)

Before we go further, let's be honest about why this happens. It's not because practice owners are financially unsophisticated. It's because they're busy.

The solo veterinarian doing 40+ procedures a week, managing a team, handling client emergencies, and running the business doesn't come home at 8 PM thinking, "I should research Treasury bill ladders tonight."

And there's a psychological component. After years of cash flow stress — the early days when making payroll was uncertain, the months when a big equipment purchase wiped out reserves — having a large cash cushion feels safe. Moving that money somewhere else triggers anxiety, even when the math clearly says it should be moved.

We get it. But the math is the math. And the math says you're paying a significant price for that comfort.

What $500,000 Could Be Earning Right Now

Let's compare three scenarios for $500,000 in excess cash, using rates available as of early 2026:

The difference between the checking account and a high-yield money market is $20,000–$22,000 per year. For doing essentially nothing — opening an account and transferring the money.

That's not investment advice. It's arithmetic. A high-yield money market at a major brokerage (Fidelity, Schwab, Vanguard) is FDIC-insured or government-backed, accessible within 1–2 business days, and pays 4%+ as of March 2026.

You're not taking risk. You're eliminating a loss.

The Opportunity Cost Beyond Interest

The $20,000+/year in interest is the easy math. But there's a broader conversation for practice owners sitting on large cash reserves: what else could that capital be doing for your practice or your personal wealth?

Here are conversations we have with practice owners in this position:

Cash balance retirement plan. If you're a solo practitioner or have a small team, a defined benefit or cash balance plan can shelter $100,000–$250,000+ per year in pre-tax retirement contributions — far more than a 401(k) alone. On $250,000 in contributions, at a 37% marginal rate, that's $92,500 in annual tax savings. These plans require actuarial setup and ongoing administration, but for high-earning practice owners, the tax savings dwarf the costs. We help practice owners evaluate cash balance retirement plans as part of our CFO advisory work.

Equipment reinvestment. That practice we analyzed had $6,560 in total capital expenditures over the trailing twelve months — on a $1.6M practice. Industry guidance suggests budgeting $30,000–$50,000/year for equipment replacement and upgrades. Near-zero capex means equipment failure is a matter of when, not if. Some of that idle cash should be earmarked for planned reinvestment.

Practice improvements that drive revenue. A digital X-ray upgrade, a new surgical suite, an expanded treatment area — these are capital investments that generate returns. A $50,000 equipment investment that enables $100,000/year in new procedure revenue pays for itself in six months.

Personal wealth building. If the practice has more cash than it needs, the excess should be working for the owner — in a brokerage account, in real estate, in a diversified portfolio. Practice owners who convert practice profits into personal wealth are the ones who can eventually step back, sell, or retire on their terms.

The cash sitting in checking isn't just losing to inflation. It's not doing any of these things.

A Simple Cash Deployment Framework

We use a straightforward framework with practice owners to determine how much cash to keep liquid and where to deploy the rest. If you haven't already mapped out your cash flow forecast, that's the foundation — you need to know your monthly burn before you can size each tier.

Tier 1: Operating Buffer (keep in checking) Two months of operating expenses. For a practice spending $70,000/month, that's $140,000. This covers payroll, rent, and vendor payments even if revenue dips temporarily.

Tier 2: Emergency Reserve (high-yield money market) One additional month of operating expenses — $70,000. Accessible within 1–2 days if needed. Earns 4%+ in the meantime.

Tier 3: Tax Reserve (money market or short-term Treasury) Estimated quarterly tax payments for the next 6 months. Set aside and clearly earmarked. Earns interest until the payment date. If you're operating as an S-Corp, your tax reserve calculation changes — factor in reasonable salary withholdings plus estimated payments on pass-through income.

Tier 4: Capital Reserve (short-term Treasuries or CD ladder) Planned equipment purchases, facility improvements, or expansion costs for the next 12–18 months. Park in Treasuries or CDs that mature when you need the funds.

Tier 5: Wealth Building (investment account) Everything above Tiers 1–4. This is capital the practice doesn't need operationally. Deploy it for the owner's long-term wealth — brokerage account, cash balance retirement plan, real estate, or other investments.

For the veterinary practice we analyzed, the allocation would look roughly like this:

Under this framework, $140,000 stays in checking (down from $737,000). The remaining $597,000 earns a blended return of roughly 4–5%, generating $24,000–$30,000 per year instead of $50.

What To Do This Week

1. Check your bank balance right now. If your business checking account holds more than three months of operating expenses, you have idle capital.

2. Open a high-yield money market account. Fidelity, Schwab, and Vanguard all offer business money market accounts paying 4%+ with no minimum balance. The application takes 20 minutes.

3. Transfer the excess. Keep two months of operating expenses in checking. Move everything else to the money market account while you develop a longer-term deployment plan.

4. Talk to your tax advisor about a cash balance retirement plan. If you're earning $300K+ and don't have a defined benefit plan, you may be leaving $50,000–$100,000+ per year in tax savings on the table.

None of this requires a financial advisor, a complex strategy, or a risk tolerance questionnaire. It requires one phone call and one transfer. The interest starts accruing the next day.

Benefique's Approach

Most accounting firms would look at $737,000 in cash and see a strong balance sheet. And they'd be right — technically. But we don't stop at what the numbers say. We ask what they mean for the owner. In this case, it meant a practice owner who worked 60-hour weeks to build that cash, only to watch inflation silently take $29,000 of it every year. That's not a balance sheet issue. It's a wealth management conversation that most accountants never have — because they're focused on compliance, not on helping you build real wealth from what you've already earned.

The Question to Ask Yourself

Your practice worked hard to generate that cash. You made good decisions, controlled costs, and built reserves that most practices would envy.

Now ask: is that cash working as hard as you did to earn it?

If $500,000+ is sitting in a checking account earning 0.01% while inflation runs at 3.5–4%, the answer is no. And the cost of inaction isn't theoretical — it's $20,000–$30,000 per year, compounding every year you wait.

That's a new practice manager. A year of marketing. A piece of equipment that generates revenue. Or simply $25,000 in risk-free interest that deposits into your account while you sleep.

The hardest part isn't the strategy. It's making the first transfer.

We help practice owners build cash deployment plans that match their risk tolerance, tax situation, and growth goals. If you're sitting on excess cash and aren't sure where to start, schedule a cash flow review →. We'll map the 5-tier framework to your specific numbers in one session — and show you exactly how much your idle cash is costing you.

Frequently Asked Questions

How much cash should a healthcare practice keep in checking?

Two to three months of operating expenses is the standard guideline. For a practice spending $70,000/month in total operating costs, that's $140,000–$210,000 in liquid checking. Everything above that should be earning a return — either in a high-yield money market, Treasury bills, or longer-term investments.

Are high-yield money market accounts safe for business funds?

Yes. Money market accounts at major brokerages (Fidelity, Schwab, Vanguard) invest in government securities and are extremely low-risk. Bank money market accounts are FDIC-insured up to $250,000 per depositor. For amounts above FDIC limits, Treasury bills are backed by the full faith and credit of the US government.

What is a cash balance retirement plan?

A cash balance plan is a type of defined benefit retirement plan that allows high-earning business owners to contribute — and deduct — $100,000–$300,000+ per year, depending on age and plan design. It's funded by the business, reduces taxable income dollar-for-dollar, and grows tax-deferred. For solo practitioners or small practices with few employees, the tax savings can be substantial.

Will moving cash out of checking affect my ability to cover expenses?

Not if you maintain an adequate operating buffer. Two months of operating expenses in checking provides a cushion for normal cash flow variability. The high-yield money market account serves as a secondary buffer — funds are accessible within 1–2 business days if you ever need them. In practice, most owners never need to dip into the money market once the operating buffer is properly sized.

How much interest can I realistically earn on idle practice cash?

At March 2026 rates, a high-yield money market or short-term Treasury pays 4.0–5.0% annually. On $500,000, that's $20,000–$25,000/year. The rate fluctuates with the federal funds rate, but even in a declining rate environment, it will substantially exceed the 0.01% most business checking accounts pay.

Disclaimer: This article is for informational purposes only and does not constitute tax, legal, or financial advice. Tax situations vary — consult a qualified tax professional for advice specific to your circumstances. Practice examples are anonymized composites based on real client data; identifying details have been changed. Investment options mentioned are for informational purposes; consult a licensed financial advisor before making investment decisions.