A deferred tax liability arises when a company’s financial statements show more income than its tax return for the same period, creating a future tax bill that has to sit on the balance sheet until it comes due. The most common deferred tax liability examples involve accelerated depreciation, bonus depreciation, and installment sales, and each one is calculated the same way: multiply the temporary difference between book and tax figures by the applicable tax rate.
Accelerated Depreciation
The textbook example is a company that depreciates equipment faster on its tax return than on its financial statements. Say a business buys a $100,000 machine with a five-year useful life. For book purposes it uses straight-line depreciation, expensing $20,000 a year. GAAP does not require straight-line, but it is the most common method in financial reporting because it spreads cost evenly.
For tax purposes the same asset runs through the Modified Accelerated Cost Recovery System under Section 168 of the Internal Revenue Code, which front-loads deductions.1Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System For five-year property under the standard half-year convention, the first-year deduction is 20 percent of cost ($20,000), and the second-year deduction is 32 percent ($32,000). In Year 2, the $32,000 tax deduction exceeds the $20,000 book expense by $12,000. At a 21 percent federal corporate rate, that $12,000 timing difference produces a deferred tax liability of $2,520.
The gap grows through the early years of the asset’s life and then reverses. Later on, MACRS deductions drop below $20,000 while book expense continues at $20,000, and the company starts paying back the taxes it deferred. By the time the asset is fully depreciated under both methods, total deductions match at $100,000 and the deferred tax liability has unwound to zero.
Bonus Depreciation After the One Big Beautiful Bill Act
The timing gap gets much larger when bonus depreciation applies. Under the One Big Beautiful Bill Act, qualified property acquired after January 19, 2025 is eligible for a permanent 100 percent first-year depreciation deduction for tax purposes.2Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill The same $100,000 machine could be deducted entirely in Year 1 for tax purposes while the books still show $20,000 of expense.
That produces an $80,000 temporary difference in the first year alone, and a deferred tax liability of $16,800 ($80,000 × 0.21). For capital-intensive businesses that buy equipment regularly, bonus depreciation is now the single largest source of deferred tax liabilities on the balance sheet. Over the remaining four years of straight-line book depreciation, the $16,800 gradually reverses as the company records $20,000 of book expense each year with no remaining tax deduction to offset it.
Installment Sales
Depreciation is not the only path to a deferred tax liability. Installment sales create the same kind of mismatch on the revenue side. Section 453 of the Internal Revenue Code lets sellers spread the recognition of gain across the years they actually receive payment rather than reporting the entire profit up front.3Office of the Law Revision Counsel. 26 US Code 453 – Installment Method
Consider a company that sells land for $200,000 with a cost basis of $150,000, producing a $50,000 gain. GAAP requires the full $50,000 to hit the income statement at the time of sale. If the buyer pays in installments, however, the tax code only taxes the profit portion of each payment as it arrives. The profit ratio is 25 percent ($50,000 ÷ $200,000). A $40,000 payment in Year 1 produces just $10,000 of taxable gain.3Office of the Law Revision Counsel. 26 US Code 453 – Installment Method
The $40,000 difference between the $50,000 book gain and the $10,000 taxable gain creates a deferred tax liability of $8,400. Each subsequent payment shrinks the gap. When the last installment arrives, total book and tax gain match at $50,000 and the liability is gone.
Interest on Large Installment Obligations
The deferral is not always free. Section 453A imposes an interest charge on the deferred tax when two conditions are met: the sale price exceeds $150,000, and the total face amount of installment obligations arising during the tax year and still outstanding at year-end exceeds $5 million.4Office of the Law Revision Counsel. 26 USC 453A – Special Rules for Nondealers The interest applies to the portion of outstanding obligations above the $5 million threshold, using the IRS underpayment rate, and it erodes the benefit of deferral on larger transactions.
How to Calculate a Deferred Tax Liability
The formula is straightforward. Take the carrying amount of the asset on the financial books, subtract its tax basis, and multiply the result by the applicable tax rate. When the carrying amount exceeds the tax basis, you have a taxable temporary difference that produces a deferred tax liability.
Using the bonus depreciation example: after Year 1, the equipment has a book carrying amount of $80,000 ($100,000 cost minus $20,000 of straight-line depreciation). Its tax basis is zero because the full $100,000 was deducted. The temporary difference is $80,000, and at 21 percent the deferred tax liability is $16,800.
Using a Blended State and Federal Rate
Most companies do not operate only at the federal level. State corporate income tax rates run from zero in states like Wyoming and South Dakota to roughly 11.5 percent in the highest-taxing states. Accountants typically use a blended rate that combines the federal rate with the applicable state rate, adjusted for the fact that state taxes are deductible on the federal return. A company facing a 6 percent state rate, for example, would use a blended rate of about 25.7 percent rather than the flat 21 percent federal figure. The difference matters, especially for companies with large timing differences from bonus depreciation.
Remeasuring When Tax Rates Change
ASC 740 requires companies to remeasure all existing deferred tax liabilities and assets immediately when a new tax rate is enacted. The adjustment hits income tax expense in the period the legislation is signed into law, not when the new rate takes effect.5Federal Deposit Insurance Corporation. Optional Worksheet for Calculating Call Report Applicable Income Taxes A rate cut shrinks existing liabilities and boosts current-period earnings. A rate increase does the opposite.
Differences That Do Not Create a Deferred Tax Liability
Not every gap between book income and taxable income produces a deferred tax liability. Only temporary differences do. Permanent differences never reverse and have no deferred tax consequences at all.
Interest earned on municipal bonds is a straightforward example. That income appears on the financial statements but is never taxed, so there is no future tax bill to defer. The same logic runs in the other direction. A fine or penalty that is not deductible for tax purposes hits book income but never reduces taxable income, and again there is no deferral to record.6Internal Revenue Service. Temporary and Permanent Book-Tax Differences – Complements or Substitutes Permanent differences affect the effective tax rate, but they do not create balance sheet obligations. Separating the two categories is the first step in any deferred tax analysis.
How the Liability Appears on the Balance Sheet
All deferred tax liabilities are classified as noncurrent, regardless of when the underlying difference is expected to reverse. FASB’s ASU 2015-17 eliminated the old requirement to split deferred taxes into current and noncurrent buckets.7Financial Accounting Standards Board. Income Taxes (Topic 740) – Balance Sheet Classification of Deferred Taxes
Within a single tax jurisdiction and for a single tax-paying entity, all deferred tax liabilities and assets are netted and presented as one noncurrent amount. A $16,800 deferred tax liability from depreciation and a $5,000 deferred tax asset from warranty accruals in the same jurisdiction show up as a single net deferred tax liability of $11,800. Amounts from different tax jurisdictions or different tax-paying entities within a consolidated group cannot be netted against each other.
The journal entry to record a deferred tax liability is a debit to income tax expense (the deferred portion) and a credit to the deferred tax liability account. That pairs the tax cost with the period the income was earned for book purposes, even though the cash payment to the IRS comes later. Footnotes then explain which temporary differences are driving the balance.
Reconciling to the Tax Return
The IRS requires corporations to formally reconcile book income with taxable income. Companies with total assets under $10 million do this on Schedule M-1 of Form 1120. Those with $10 million or more must file the more detailed Schedule M-3.8Internal Revenue Service. Instructions for Schedule M-3 (Form 1120) Both schedules force the company to identify every book-tax difference and categorize it, which is where the deferred tax liability calculations translate from the balance sheet into an actual filing. For companies with complex depreciation schedules or large installment obligations, the reconciliation often runs to dozens of line items.