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A widely shared post this fall said a person who paid $1 in federal income tax paid more than several large companies, including Tesla. Responses pointed to cash taxes and loss carryforwards. Each side’s numbers match a different line in the same filing. That is possible because “what did the company pay?” is not one question. A Form 10-K, the annual report public companies file with the Securities and Exchange Commission (SEC), answers it in at least four ways, and each one sits on a different line of the income tax note. Current tax expense is the tax cost of the year’s taxable income. Deferred tax expense is the tax cost that comes from changes in what the company expects to owe or recover in later years. Cash taxes paid is what actually went out the door during the year, net of refunds. The effective tax rate is total book tax expense shown as a percentage of pretax income. This article reads one real note: Note 12, “Income Taxes,” in Tesla, Inc.’s Form 10-K for the year ended December 31, 2025, which was filed on January 29, 2026. It uses only figures Tesla reported. It does not look at Tesla’s tax return, which is not public, and it takes no position on tax policy.
A 10-K has a section of financial statements. Investor.gov, the SEC’s investor education site, says that section “contains the company’s audited financial statements, including the income statement, balance sheets, and statement of cash flows.” The notes to those statements sit alongside them. In Tesla’s filing, the income tax note is Note 12. Two sets of rules meet in that note. The financial statements follow U.S. GAAP, the accounting standards, so the 10-K reports book amounts. The tax return follows the Internal Revenue Code. For a corporation, the federal rate is set by section 11(b): “The amount of the tax imposed by subsection (a) shall be 21 percent of taxable income.” But taxable income is figured on the return, and it differs from the pretax income on the income statement. The tax note is where the bridge between the two is shown. Tesla describes its method in Note 2: “Income taxes are computed using the asset and liability method, under which deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates…” In plain words, the company compares the amount an asset or liability carries on the books with its tax basis (its amount for tax purposes), and records the future tax effect of any gap. The return itself is not part of the filing.
Note 12 starts with the provision for income taxes, split into current and deferred and then by jurisdiction. Current tax expense is the expense for amounts payable, or refundable, on the year’s taxable income. Deferred tax expense is the expense from changes in deferred tax assets and liabilities, which covers temporary differences (timing gaps between book and tax amounts) and carryforwards being created or used. Tesla’s 2025 figures, in millions of dollars, read current first and deferred second. Federal: a dash for current and $434 for deferred. State: $5 current and $21 deferred. Foreign: $1,295 current and $(332) deferred. Total: $1,300 current and $123 deferred. The total provision for 2025 was $1,423. The same note shows a total provision of $1,837 for 2024 and $(5,001) for 2023, which is a tax benefit. The federal row is the whole story in miniature. Current federal tax is a dash, and deferred federal tax is $434 million. Tesla recorded federal income tax expense for 2025, all of it on the deferred line. The note does not say which items drove that $434 million, so this article does not guess. One cross-check helps when you are learning to read these. The cash-flow statement lists “Deferred income taxes” of 123 as a non-cash adjustment, which matches the total deferred line in the note.
ASU 2023-09 is an accounting standards update the Financial Accounting Standards Board issued in December 2023. Before it, companies generally had to disclose only a total for income taxes paid. Tesla’s 10-K says the update “requires disaggregated information about a reporting entity’s effective tax rate reconciliation as well as additional information on income taxes paid.” Tesla “adopted this ASU on a prospective basis effective January 1, 2025.” In plain terms, prospective means the new tables apply going forward, without restating earlier years. So 2025 is the first year Tesla’s note shows cash paid for income taxes, net of refunds, by jurisdiction. In millions of dollars: federal $28, California $86, other states $65, China $751 and other countries $302, for a total of $1,232. For the two earlier years the note gives totals only: $1.33 billion for 2024 and $1.12 billion for 2023. Cash differs from expense because of timing. Cash paid in a year can relate to prior-year returns, estimated payments, settlements or refunds, and the note reports it net of refunds. Timing differences of this kind are how a federal cash figure and a dash on the current federal line can sit side by side. Tesla’s note does not say which tax year the $28 million relates to, so the reason for that specific figure is not shown.
A net operating loss, or NOL, is a tax loss that can be carried forward and used against taxable income in later years. Tesla’s note says: “As of December 31, 2025, we had $3.56 billion of federal and $8.22 billion of state net operating loss carry-forwards available to offset future taxable income, an immaterial amount of which, if not utilized, will begin to expire in 2026.” It also lists credit carryforwards: “federal research and development tax credits of $1.83 billion, federal renewable energy tax credits of $1.38 billion, and state research and development tax credits of $1.21 billion.” This article treats the credits as carryforwards only. It does not discuss how any credit is earned or qualified. Do not confuse the gross loss with the deferred tax asset. The deferred tax asset table shows “Net operating loss carry-forwards” of $1,083 million for 2025 and $1,295 million for 2024. The $3.56 billion is a gross loss amount. The $1,083 million is a tax-effected asset (the tax value of the loss, not the loss itself) in Tesla’s consolidated deferred tax table, and the note does not split it by jurisdiction. They are different measures, so one cannot be used to work out the other. There is also a cap. Under section 172(a), for losses arising in tax years beginning after December 31, 2017, the deduction is limited to the lesser of those losses or “80 percent of the excess (if any) of” taxable income, figured without the NOL deduction and certain other deductions, over the deduction for older losses. Losses from earlier years are not subject to that cap. Tesla’s note does not say how much of its NOL is from before 2018. Finally, section 382. Tesla’s note says federal and state laws “can impose substantial restrictions on the utilization of net operating loss and tax credit carry-forwards in the event of an ‘ownership change,’ as defined in Section 382,” and that Tesla has “determined that no significant limitation would be placed on the utilization of our net operating loss and tax credit carry-forwards due to prior ownership changes or expirations.”
A deferred tax asset is only worth recording if the company expects to use it. A valuation allowance reduces deferred tax assets to the amount “expected to be realized.” Describing the fourth quarter of 2023, Tesla’s note says: “we concluded that it is more likely than not that most of our U.S. federal and certain state deferred tax assets are realizable and released the valuation allowance on these deferred tax assets.” The 2023 reconciliation shows a “Change in valuation allowance” of $(5,962) million, and the total 2023 provision was $(5,001) million, a tax benefit. Here is why 2023 matters for reading later years in general. As a general mechanism, once deferred tax assets are on the balance sheet, using them up in a later year is recorded as deferred tax expense, not current tax. That is the general rule only. Tesla’s note does not say which items produced its $434 million of deferred federal expense in 2025. Valuation allowances did not go away. As of December 31, 2025, Tesla reported valuation allowances of $1.77 billion, “which primarily included our California deferred tax assets, U.S. foreign tax credits and certain capitalized foreign expenses.” The allowance “increased by $541 million” in 2025. Later filings report changes, so this describes the year-end 2025 position only.
The rate reconciliation starts at the federal statutory rate and ends at the company’s effective rate. It reconciles book tax expense, which is current plus deferred. It does not reconcile cash, and it does not reconcile current federal tax alone. Start from Tesla’s total pretax income of $5,278 million. Tesla’s 10-K also shows domestic pretax income of $4,766 million for 2025, which is a different figure. In the new ASU 2023-09 format, Tesla’s 2025 lines read as follows, in millions of dollars with the percentage after each. Starting point: U.S. federal statutory tax rate, $1,108, 21.0%. Foreign lines: China statutory rate difference, $60, 1.1%; China withholding tax, $361, 6.8%; China other, $(37), (0.7)%; other foreign jurisdictions, $331, 6.3%. Tax credit lines: research and development tax credits, $(352), (6.7)%; foreign tax credits, $(327), (6.2)%. Nontaxable or nondeductible items: nontaxable manufacturing credits, $(354), (6.7)%; stock-based compensation, $(172), (3.3)%; other, $83, 1.6%. Other lines: changes in valuation allowances, $389, 7.5%; changes in unrecognized tax benefits (tax positions where the full benefit has not been recognized), $194, 3.7%; other adjustments, $139, 2.6%. Ending point: effective tax rate, $1,423, 27.0%. Positive lines push the rate up, and negative lines pull it down. Tesla’s MD&A (management’s discussion and analysis) says its effective tax rate increased from 20% to 27% “primarily due to changes in the mix of our jurisdictional earnings” and names two more drivers: a decrease in foreign income deductions and the remeasurement of certain deferred tax assets, and ties both to legislation it abbreviates as OBBBA. Be careful comparing years. The 2024 and 2023 columns use the older format, with lines such as “U.S. tax credits” of $(317) million for 2024, so the lines are not one-to-one comparable across years.
Here is a two-sentence answer a practitioner could give a client: “For 2025, Tesla’s 10-K shows no current federal income tax expense, $434 million of deferred federal tax expense, and $28 million of federal income tax paid in cash, net of refunds. Its total income tax expense was $1,423 million, a 27.0% effective rate, and $1,295 million of its $1,300 million of current tax expense was foreign.” Just as important is what the note cannot tell you. It is not the tax return. It does not say which year the $28 million of cash relates to. It does not say how much of the $3.56 billion of federal loss carryforwards is from before 2018. And it does not break the $434 million of deferred federal expense down line by line. When a note does not show something, “the filing doesn’t show this” is the accurate answer, and it is better than a guess. Four terms keep the conversation precise: current tax expense, deferred tax expense, cash taxes paid net of refunds, and effective tax rate (book). Do not use “paid” on its own; name the measure whenever a one-word summary is used. Reading a note is the first step. Explaining it back to a client in two sentences is how you know you understand it.
“What did the company pay?” has at least four honest answers in a 10-K: current tax, deferred tax, cash paid, and the effective rate. For Tesla’s 2025, current federal tax is a dash, deferred federal tax is $434 million, federal cash paid, net of refunds, is $28 million, and the book rate is 27.0%. All four are right; none of them is the whole picture on its own.
In your own words: (1) Explain to a client, in two sentences, why Tesla’s 10-K can show both a dash for current federal tax and $434 million of federal tax expense for 2025. (2) Why might federal cash taxes paid ($28 million) differ from current federal tax expense for the same year? (3) What did the 2023 valuation-allowance release change, and why does it matter for reading later years?
Reading a good explanation feels like understanding it. Usually it isn't the same thing — and you don't find out which one you've got until someone asks you to explain it back.