Amortization vs. Depreciation: What Each Method Expenses, and the Loan Schedule That Confuses Everyone

You buy a $30,000 delivery van and a $30,000 customer list from a retiring competitor in the same year. Both cost you the same money, both will benefit your business for years — and if you expense them the same way, your profit will be wrong in both directions at once. The van gets depreciated over five years with a salvage value left over at the end; the customer list gets amortized over fifteen years with nothing left over. Mix up which method belongs to which asset and you will overstate this year's deductions, understate next decade's, and hand your tax preparer a reconciliation puzzle in April.

This guide draws the line clearly: what depreciation expenses and why, what amortization expenses and why, how the two calculations differ in salvage value, methods, and bookkeeping entries, and what your mortgage's "amortization schedule" has to do with any of it. Same word, different machinery — and the confusion costs real money.

The One-Sentence Difference​

Depreciation spreads the cost of tangible assets; amortization spreads the cost of intangible assets. Everything else — the methods, the salvage value, the tax rules — follows from the physical difference between the two kinds of property.

Both exist for the same reason: the matching principle. When an asset benefits your business for years, accounting matches its cost against the revenue of those years instead of dumping the whole expense into the purchase month. A $30,000 van bought in March did not cost March $30,000 of value; it will haul goods for five years, so each of those years absorbs part of the cost. Depreciation and amortization are simply the two allocation machines, one for things you can touch and one for things you cannot.

What Depreciation Expenses​

Depreciation applies to fixed tangible assets: buildings, equipment, office furniture, vehicles, machinery, computers, leasehold improvements. These are physical objects that wear out, get used up, become obsolete, or simply age. Each year of use consumes part of their value, and depreciation books that consumption as an expense.

Three things about depreciation surprise first-time owners:

Land never depreciates. The building on it does; the dirt underneath does not, because land does not wear out or get used up. When you buy property, the purchase price must be split between depreciable building and non-depreciable land — a step buyers routinely skip and auditors routinely catch.

Salvage value comes off the top. Tangible assets usually retain some residual worth — a five-year-old van still sells for something, an old machine still has scrap value. So depreciation is calculated on cost minus salvage value, the amount you expect to recover at the end. A $30,000 van with a $5,000 salvage value and a five-year life depreciates $25,000 total, or $5,000 a year on the straight-line method.

You get a choice of methods. The common options:

• Straight-line: equal expense every year. Simple, predictable, and the default most small businesses should start with.
• Declining-balance: a fixed percentage of the remaining book value each year, so early years take bigger charges. Fits assets that lose value fastest when new, like vehicles and computers.
• Sum-of-the-years'-digits: another accelerated method, front-loading expense through a declining fraction.
• Units-of-production: expense follows actual use — miles driven, hours run, units produced — rather than calendar time. Ideal for machinery with uneven workloads.

For tax purposes, most tangible business property uses the Modified Accelerated Cost Recovery System (MACRS), which assigns each asset class a recovery period and generally accelerates deductions relative to book depreciation. On top of that, Section 179 expensing and bonus depreciation can let you write off qualifying equipment immediately rather than over years. The practical consequence: your books and your tax return will often depreciate the same asset on different schedules, and that is normal — but you must track both, because the difference reverses in later years.

What Amortization Expenses​

Amortization applies to intangible assets: patents, copyrights, trademarks, franchise agreements, customer lists, non-compete agreements, software licenses, organizational costs, and the cost of issuing bonds. These assets have real value but no physical substance — nothing to wear out, nothing to sell for scrap.

That absence of physical substance drives every difference from depreciation:

No salvage value. An expired patent is worth nothing; a fully amortized customer list has no scrap market. So the amortization base is the full cost, with nothing subtracted. A $30,000 patent with a ten-year life amortizes at $3,000 a year — the entire cost, evenly spread.

Almost always straight-line. Intangibles do not have heavier early years the way a new delivery van does, so the straight-line method dominates. Each period takes the same charge. Accelerated amortization is rare in practice.

Useful life comes from law or contract. A patent's life is bounded by its legal term; a franchise agreement's by its contract; a non-compete's by its clause. When no legal limit exists — a trademark you renew indefinitely — the asset may have an indefinite life and escape amortization entirely on the books, tested instead for impairment.

The tax side has its own rigid rule worth memorizing. Section 197 requires most intangibles acquired with a business — goodwill, going-concern value, customer lists, trademarks, licenses, non-compete agreements — to be amortized ratably over 15 years (180 months), starting in the month of acquisition, regardless of actual useful life. Buy a customer list you expect to milk for five years and the IRS still stretches the deduction over fifteen. That single rule is why acquired intangibles so often show one life on the books and another on the return.

Goodwill deserves a special warning because it breaks the pattern. Under US GAAP, goodwill from an acquisition is not amortized on the financial statements at all — it sits on the balance sheet and gets tested annually for impairment, written down only when its value has actually dropped. (Private companies may elect a simplified alternative amortizing goodwill over up to ten years.) But for tax purposes, acquired goodwill is a Section 197 intangible amortized over 15 years. Same asset, three possible treatments depending on which set of rules you are following — book GAAP, private-company GAAP, or tax. Document which one each schedule follows or the next person to touch the file will guess wrong.

Side by Side: Every Difference That Matters​

The bookkeeping row deserves a moment. Depreciation accumulates in a contra account so the balance sheet keeps showing both the asset's original cost and its total depreciation-to-date; net book value is the difference. Amortization usually credits the intangible asset account directly, shrinking its carrying value with each entry. Either way, both are non-cash charges: the cash left when you bought the asset, and these entries recognize the cost without moving another dollar — which is why both get added back to net income on the statement of cash flows.

Worked Example: The Same $30,000, Two Different Expenses​

Return to the opening purchase. Same year, same $30,000 outlay each:

The van (depreciation). Cost $30,000, five-year life, $5,000 salvage value, straight-line. Depreciable base is $30,000 minus $5,000, or $25,000. Annual expense: $5,000. After year one, the balance sheet shows equipment at $30,000 cost, accumulated depreciation of $5,000, net book value $25,000.

The customer list (amortization). Cost $30,000, acquired with the competitor's business, so Section 197 applies for tax. Book treatment over an estimated five-year useful life: $6,000 a year. Tax treatment over the mandatory fifteen years: $2,000 a year. After year one, the books carry the list at $24,000 while the tax return carries it at $28,000 — a $4,000 temporary difference that reverses over the following years.

Notice what happens if you swap the methods. Depreciate the customer list over five years with a salvage value and you have invented a resale value for an asset with no resale market while ignoring the 15-year tax mandate. Amortize the van with no salvage value and you expense value the van still holds. The methods are not interchangeable decorations; each encodes assumptions about the asset it fits.

The Other Amortization: Your Loan Schedule​

Here is the meaning that confuses everyone. Your mortgage lender sends an amortization schedule — a table splitting every payment into principal and interest — and it has nothing to do with patents. Why the same word?

Because the underlying idea matches: gradually writing off a balance over time. A loan is, in a loose sense, an intangible item being reduced to zero across periods. Each payment chips away at the carrying value of the debt, just as each amortization entry chips away at the carrying value of a patent. Lenders borrowed the accountant's word for their own version of the process.

How the schedule works: every payment covers that month's interest first, and whatever remains reduces principal. Early on, the balance is large, so interest eats most of the payment; late in the loan, the balance is small, so nearly the whole payment attacks principal. On a 30-year, $300,000 mortgage at 6.5 percent, the first payment of about $1,896 splits into roughly $1,625 of interest and only $271 of principal — while near the end, the proportions flip almost entirely. That front-loaded interest is why extra principal payments in the early years save so much: each extra dollar skips years of interest it would otherwise have accrued.

For a business borrower, the split carries a tax consequence worth tracking. Loan interest is generally deductible; principal repayment is not — it is balance-sheet movement, paying down a liability. Every business loan payment therefore needs dividing into its deductible and non-deductible halves before it hits the books. The amortization schedule your lender provides is the document that performs that split; file it with the loan agreement and book from it monthly rather than expensing whole payments and fixing the error at year-end.

Mistakes That Misstate Profit in Both Directions​

Depreciating land. The most common fixed-asset error. Allocate the purchase price between land and building at acquisition — an appraisal or the property tax assessment ratio both work — and depreciate only the building.

Amortizing goodwill on GAAP books. Unless you have elected the private-company alternative, goodwill is impairment-tested, not amortized. Writing it down on a schedule understates assets every year until someone unwinds the error.

Using book lives on the tax return. MACRS periods and the Section 197 fifteen-year rule override your book estimates for tax purposes. Maintain separate book and tax schedules for every material asset rather than keeping one set and hoping.

Expensing the whole loan payment. Principal is not interest. Booking full payments to interest expense overstates deductions and leaves the liability overstated on the balance sheet — an error that compounds monthly.

Capitalizing too little — or too much. Small tools and minor assets below your capitalization threshold should be expensed immediately, not tracked for a decade; major improvements that extend an asset's life should be capitalized, not expensed. Set a written threshold (many small businesses use $2,500, matching the tax safe harbor) and apply it consistently.

Booking It: Depreciation, Amortization, and the Loan Split​

The month-end entries follow directly from the table above. Depreciation debits the expense and credits the contra account; amortization debits the expense and credits the intangible directly; the loan payment splits three ways across interest, principal, and cash. In a plain-text ledger, one month of all three looks like this:

2026-01-02 open Assets:Fixed:Delivery-Van USD
2026-01-02 open Assets:Fixed:Accumulated-Depreciation USD
2026-01-02 open Assets:Intangible:Customer-List USD
2026-01-02 open Liabilities:Bank-Loan USD
2026-01-02 open Expenses:Depreciation:Vehicles USD
2026-01-02 open Expenses:Amortization:Intangibles USD
2026-01-02 open Expenses:Interest:Bank-Loan USD
 
2026-10-31 * "Month-end" "Record October depreciation, amortization, and loan payment"
  Expenses:Depreciation:Vehicles  416.67 USD
  Assets:Fixed:Accumulated-Depreciation  -416.67 USD
  Expenses:Amortization:Intangibles  500.00 USD
  Assets:Intangible:Customer-List  -500.00 USD
  Expenses:Interest:Bank-Loan  812.50 USD
  Liabilities:Bank-Loan  687.50 USD
  Assets:Cash:Checking  -1500.00 USD

The depreciation leg preserves the van's original cost while the contra account accumulates; the amortization leg shrinks the customer list directly; the loan leg sends only the interest portion to expense while principal reduces the liability. If you keep your books this way, the fixed-asset documentation shows how these accounts flow into standard reports, and the Fava dashboard renders cost, accumulated depreciation, and net book value side by side so you can verify every schedule at a glance.

Your Next Step: Audit the Register​

Pull your fixed-asset and intangible-asset registers — or build them if they exist only as a folder of receipts. For each line, confirm four things: the method matches the asset type (depreciation for tangibles, amortization for intangibles), the life matches the right authority (MACRS or Section 197 for tax, realistic useful life for books), salvage value appears only where a resale market actually exists, and every business loan payment is booked from the lender's schedule with principal and interest split. Assets that fail any of those checks are misstating this year's profit in one direction or the other — and every month they sit uncorrected, the reversal waiting in a future period grows larger.