Projected 2027 Tax Brackets and Standard Deductions Rise 3.2% on Inflation Rebound

The standard deduction for married couples will jump to a projected $33,200 in 2027, while the top marginal tax bracket will not trigger until joint income exceeds $793,650, following a rebound in consumer inflation that has forced larger upward adjustments to the federal tax code. The shifts mean Americans will be able to earn more money next year before moving into higher tax tiers.[1][2]

Tax and accounting firms Wolters Kluwer, Thomson Reuters, and Bloomberg Tax released their annual projections for the 2027 tax year this week, applying the statutory inflation formulas to the final consumer price data released in September. The forecasts indicate a 3.2% upward adjustment across the tax code, a steeper increase than the 2.7% bump applied for the 2026 tax year.[1][2][3]

For taxpayers, the adjustments dictate how much income is shielded from federal taxation entirely and where the boundaries for higher marginal rates are drawn. By expanding the brackets, the tax code prevents bracket creep—a scenario where cost-of-living raises push workers into higher tax tiers even though their actual purchasing power has not improved.[2][4]

The standard deduction, claimed by the vast majority of U.S. filers, will see substantial increases. Projections place the 2027 deduction at $16,600 for single filers and married individuals filing separately. Heads of household will see their deduction rise to $24,950, shielding a larger portion of their earnings from the IRS.[1][2]

For married couples filing jointly, the standard deduction is projected to reach $33,200. This means a married couple earning exactly that amount in 2027 will owe no federal income tax, establishing a higher floor for taxable income before any marginal rates apply.[1]

The income thresholds for the seven statutory tax brackets—10%, 12%, 22%, 24%, 32%, 35%, and 37%—are also shifting upward. The 10% bracket will cover the first $12,800 of taxable income for single filers and the first $25,600 for married couples filing jointly.[2]

At the upper end of the income spectrum, the top 37% marginal rate will apply only when taxable income exceeds $661,375 for single taxpayers. For married couples filing jointly, that top threshold is projected to rise to $793,650, providing high earners with a wider band of income taxed at the 35% rate.[2]

Long-term capital gains brackets are similarly indexed to inflation. While the 0%, 15%, and 20% rates remain fixed by statute, the income levels at which they apply will expand. The maximum zero-rate amount for joint filers is projected to reach $102,100, allowing couples to realize over a hundred thousand dollars in investment gains tax-free if they have no other taxable income.[2]

The Alternative Minimum Tax exemptions are also projected to climb. The exemption amount is expected to reach $144,700 for married taxpayers filing jointly and $93,000 for unmarried taxpayers. The phaseout thresholds for these exemptions will begin at $1,031,900 for joint filers, keeping fewer upper-middle-class households subject to the parallel tax system.[2]

This year's calculations required forecasters to navigate an unprecedented anomaly in the underlying federal data. The statutory formula relies on the chained Consumer Price Index for the 12-month period ending in August of the preceding year.[1][2]

However, the federal government shutdown in late 2025 halted data collection at the Bureau of Labor Statistics. As a result, the agency never published an October 2025 index value, leaving a hole in the standard 12-month lookback window.[1][2]

To bridge the gap, forecasters "calculated its adjustment using an 11-month average rather than the usual 12 months," according to Taxgirl's analysis of the Bloomberg Tax projections. Wolters Kluwer similarly noted that its models relied on the 11 available months between September 2025 and August 2026.[1][2]

The Internal Revenue Service is expected to release the official 2027 inflation adjustments in late October or November. While the agency has not yet clarified how it will legally resolve the missing October 2025 data point, the tight consensus among major accounting firms provides tax professionals and financial planners the baseline needed to begin structuring 2027 deferrals, Roth conversions, and investment sales.[1][2][3][4]