Deferred taxes: DTAs and DTLs
By SuperdayReps · Wharton MBA · ex-Greenhill · investment banking interview coaching
7 min read · updated July 2, 2026
Here's the whole idea in one line: a company keeps two sets of books, and deferred taxes are the bridge between them. One set follows accounting rules and gets reported to shareholders. The other follows the tax code and gets sent to the IRS. Those two never agree in a given year, and the gap has to live somewhere on the balance sheet. That's what a deferred tax asset or liability is.
Most beginners freeze on this topic because it sounds like tax law. It isn't. It's a timing story, and once you see the direction of the timing, the whole thing collapses into something you can reason through cold.
Two sets of books, one company
The number on the income statement is the book tax (also called the tax provision). It's what accounting says the company owes based on its reported pre-tax profit. The cash tax is what actually gets wired to the government, computed on the tax return using different rules.
In almost every year those two numbers differ. The difference is either temporary (it reverses in a later year) or permanent (it never reverses, like a fine that's never tax-deductible). Deferred taxes only track the temporary ones, because those are the differences that flip back at some point.
A deferred tax balance is not real cash sitting anywhere. It's an IOU that tracks a difference in timing between book profit and taxable profit. When the timing catches up, the balance unwinds to zero.
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Frequently asked
- What are deferred taxes?
- Deferred taxes are the bridge between a company's two sets of books: one built on accounting rules for shareholders, one on the tax code for the IRS. The two rarely agree in a given year, and that timing gap has to live on the balance sheet as a deferred tax asset or liability.
- What is the difference between a DTA and a DTL?
- A deferred tax liability means you paid less cash tax than your books show this year, so you owe more later. A deferred tax asset means you will pay less tax in the future, a benefit waiting to be used. Anchor on whether you pay more or less cash tax later.
- Why does an asset write-up in an acquisition create a DTL?
- Because the buyer marks the target's assets up on the books while the IRS often leaves the tax basis alone. Book basis above tax basis is a taxable temporary difference, so a DTL goes on the opening balance sheet at close. The later years of higher cash tax are that DTL unwinding, not what creates it.
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