The most common mistake practice owners make is booking the entire monthly payment as an expense. For equipment loans and most leases, only a portion of each payment is actually an expense. The rest reduces a liability on your balance sheet. Getting this wrong inflates your costs, distorts your profit margins, and gives you bad financial data when you need to make decisions about the practice.

Equipment loans are the most straightforward. When you finance a piece of equipment through a bank or lender, you record the full purchase price as a fixed asset and the loan balance as a liability. Each monthly payment gets split between principal (which reduces the loan balance) and interest (which is an expense). Your lender’s amortization schedule shows exactly how much of each payment goes where. The equipment itself gets depreciated over its useful life, which creates an additional expense on your income statement separate from the loan payments.

Capital leases, also called finance leases, work similarly. If the lease agreement transfers ownership at the end, includes a bargain purchase option, or covers most of the equipment’s useful life, it’s treated like a purchase for accounting purposes. Record the equipment as an asset on your balance sheet and the total lease obligation as a liability. Depreciate the asset over its useful life and split each lease payment between principal and interest, just like a loan.

Operating leases are different. Traditionally these were simply recorded as rent expense each month. Under current accounting standards, businesses are supposed to record a right-of-use asset and a corresponding lease liability on the balance sheet. Many small practices still follow the simpler treatment depending on their reporting requirements. Your accountant can tell you which approach you need to follow based on the size of your practice and who reads your financial statements.

Regardless of the financing type, track every piece of equipment individually. Each asset needs its own depreciation schedule based on its cost, useful life, and the depreciation method you’re using. Medical and dental equipment often qualifies for Section 179 expensing or bonus depreciation, which can accelerate the tax benefit significantly in the year you put the equipment in service. But that election needs to be made deliberately and documented properly.

In QuickBooks, create separate liability accounts for each loan or lease so you can track balances independently. When you make a payment, split the transaction so that part goes to the liability account for principal and part goes to an interest expense account. Don’t use the expense function for the whole payment amount. Use a journal entry or split the check properly. If you’re just categorizing the full payment as “equipment expense” or “lease expense,” your balance sheet is wrong and your P&L is overstating costs.

Build a fixed asset register that lists every piece of financed equipment with its description, acquisition date, cost, financing type, depreciation method, and useful life. This becomes your reference for monthly depreciation entries and saves your accountant significant time at tax time.

For practices with multiple pieces of financed equipment, this adds real complexity quickly. A dental office might have panoramic X-ray units, operatory chairs, a CBCT machine, and a laser all on different financing terms. Each one has its own payment schedule, depreciation timeline, and balance sheet treatment. Missing one or recording it incorrectly compounds over months and years until your financial statements don’t reflect reality at all.

If you’re behind on this or unsure whether your current books handle equipment financing correctly, that’s worth getting cleaned up sooner rather than later. Having reliable small business bookkeeping services in place means each new equipment purchase gets recorded properly from day one, depreciation entries happen on schedule, and your loan balances actually match what you owe. That accuracy matters when you’re evaluating whether the practice can take on another equipment purchase or when you’re preparing financials for a lender.