Introduction
In its 2025 fiscal year, Apple earned $132.7 billion before tax. The US federal statutory rate on that income was 21%. Apple's income statement showed tax expense of $20.7 billion, an effective rate of 15.6%. And the company paid $43.4 billion of income taxes in cash, 32.7% of its pre-tax income. Three tax rates, all correct, spread across seventeen percentage points.
Each rate answers a different question. The statutory rate is what the law sets. The effective rate is what the accounting charges against this year's earnings. The cash rate is what actually left the bank account. Bankers use all three, and using the wrong one in the wrong place is one of the most common modeling errors. The gaps between them come from the book-tax differences explained in book vs tax accounting.
The Three Rates
The effective and cash rates share a denominator, pre-tax income from the income statement, so the gap between them comes entirely from the numerators: tax recorded against tax paid. The statutory rate is not computed at all; it is read from the law.
| Rate | Calculation | Where to find it | Main use |
|---|---|---|---|
| Statutory | Set by law: 21% US federal, plus state and foreign rates | The first line of the rate reconciliation | Starting point; long-run marginal rate |
| Effective | Provision for income taxes divided by pre-tax income | Income statement and tax note | Earnings per share (EPS) forecasts, price-to-earnings (P/E) comparisons |
| Cash | Income taxes paid, net of refunds, divided by pre-tax income | Supplemental cash flow disclosure and tax note | Cash flow analysis, tax planning, diligence |
The marginal tax rate, the rate on the next dollar of taxable income, is usually close to the combined statutory rate: for a US company, 21% federal plus state taxes, net of their federal deduction, typically gives about 24% to 26%. The effective rate differs from it because of permanent differences and rate effects: income taxed abroad at lower rates, tax credits, non-deductible expenses, changes in valuation allowances and one-off items. The cash rate differs from the effective rate because of temporary differences, which shift tax between years, and because of the timing of payments, refunds and settlements. The two kinds of difference are compared in permanent vs temporary differences, and the main temporary one, accelerated depreciation, builds up the balances described in deferred tax liabilities.
Building a Combined Statutory Rate
For a US company, the combined statutory rate adds state income taxes to the 21% federal rate, after allowing for the fact that state taxes are deductible for federal purposes. A company paying an average state rate of 5% has a combined rate of about 24.95%: 21% plus 5% times one minus 21%. For a multinational, the relevant statutory rate is a blend of the rates in each country where it earns income, weighted by the income earned there. That blended rate, not the US rate alone, is the better anchor for a company with large foreign operations, though foreign income taxed below the US rate may still face some US tax under the rules for foreign earnings or the global minimum tax.
Reading the Rate Reconciliation
Every US public company reconciles the tax it would owe at the federal statutory rate to the provision it actually recorded. This rate reconciliation is the map of why the effective rate is what it is. Apple's 2025 annual report shows two very different years:
| Line item | FY2024 | FY2025 |
|---|---|---|
| Income before provision for income taxes | 123,485 | 132,729 |
| Computed expected tax at 21% | 25,932 | 27,873 |
| Earnings of foreign subsidiaries | (5,311) | (8,120) |
| Change in valuation allowance | 0 | 2,091 |
| Research and development credit, net | (1,397) | (1,049) |
| Impact of the State Aid Decision | 10,246 | (486) |
| Other | 279 | 410 |
| Provision for income taxes | 29,749 | 20,719 |
| Effective tax rate | 24.1% | 15.6% |
| Cash paid for income taxes, net | 26,102 | 43,369 |
| Cash tax rate | 21.1% | 32.7% |
Source: Apple 2025 Form 10-K; fiscal years end in late September. Cash tax rate is cash taxes paid divided by income before taxes.
The recurring items push the rate down. Apple earned $82.0 billion of its pre-tax income abroad, much of it taxed below 21%, and the federal research credit cut its tax by $1.0 billion to $1.4 billion a year. The State Aid line is the one-off item. In September 2024, the European Court of Justice upheld the European Commission's 2016 decision that Ireland had granted Apple illegal state aid, and Apple recorded a one-time net charge of $10.2 billion, which lifted its fiscal 2024 effective rate from about 15.8% to 24.1%.
- Rate reconciliation
The table in the income tax note that bridges tax at the statutory rate on pre-tax income to the provision actually recorded, line by line. Accounting Standards Update (ASU) 2023-09, effective for fiscal years beginning after December 15, 2024 (calendar 2025 for most companies), requires public business entities to present it in both amounts and percentages, in eight specified categories such as state and local taxes, foreign tax effects, tax credits, valuation allowances and nondeductible items, with larger items broken out. Apple first applies it in fiscal 2026, which is why its table shows dollars only.
Why the Cash Rate Moved the Other Way
The cash rate tells a different story because cash follows payment dates, not the year in which the tax is recorded. The $15.8 billion owed to Ireland under the State Aid decision, held in escrow since 2018, was booked in fiscal 2024 but released to the Irish state between October 2024 and May 2025, all within fiscal 2025. Apple was also paying the last installments of the one-time tax on accumulated foreign earnings imposed by the 2017 tax act, with $8.8 billion still payable at the end of fiscal 2025. Both pushed fiscal 2025 cash taxes to $43.4 billion, more than double the effective tax charge. Neither tells an analyst much about the tax Apple will pay on future earnings.
Which Rate to Use
The right rate depends on the purpose of the calculation:
- Earnings and EPS forecasts: a normalized effective rate, excluding one-off items such as the State Aid charge, settlements and valuation allowance changes, because reported EPS uses book tax expense.
- Unlevered free cash flow: tax on operating income, at a rate that reflects what the business would pay without debt. Near-term years can use the effective rate adjusted for expected deferred tax movements; later years and the terminal value should move toward the marginal rate.
- After-tax cost of debt: the marginal rate, because interest saves tax at the rate on the last dollar of income, provided the company is taxable and the interest is deductible.
- Leveraged buyouts and credit analysis: cash taxes computed after interest expense, applying any limits on interest deductions, because the question is how much cash is left to service debt.
The limits that matter most for leveraged companies are covered in interest deductibility limits under Section 163(j). The convergence to the marginal rate reflects the logic Aswath Damodaran sets out in his answer on which tax rate to use in a valuation: using an effective rate below the marginal rate in perpetuity is a dangerous assumption, because the deferrals and advantages that hold it down rarely last forever. Companies with tax losses are the exception in the other direction: their rate can be close to zero until the losses are used, as covered in net operating losses.
Normalizing the Effective Rate
A reported effective rate is a starting point, not a forecast. To normalize it, remove items that will not recur and judge the ones that may. Apple's fiscal 2024 rate falls to about 15.8% once the State Aid charge is removed, close to its 15.6% in 2025 and its 14.7% in 2023. Its fiscal 2025 rate includes a $2.1 billion valuation allowance increase, which may or may not recur.
Several recurring items need judgment rather than removal. Excess tax benefits from stock compensation, which lower the rate when the share price rises, depend on the share price at vesting, as covered in the tax effects of stock-based compensation. The mix of income between high- and low-tax countries can shift with the business. And changes in tax law, such as the global minimum tax now in force in many countries, can raise the effective rate of companies whose foreign income has been lightly taxed.
The statutory rate tells you what the law asks for, the effective rate what the accounts recognize, and the cash rate what the company actually paid. A model that uses each in its proper place, and normalizes away one-off items like Apple's State Aid charge, will forecast both earnings and cash far more reliably than one that picks a single rate for everything.
