IRS Raises 2027 Tax Brackets and Standard Deductions

Higher income thresholds and larger deductions will change how Americans calculate their federal tax liabilities in 2027, following an Internal Revenue Service announcement on November 5, 2026. The adjustments affect individual taxpayers, married couples, investors, and estate holders as inflation continues to influence household expenses and financial planning.

According to the IRS announcement reported by CNBC, the revised income thresholds apply to the 2027 tax year, with taxpayers filing their corresponding returns in 2028. The changes cover seven federal income tax brackets, ranging from 10% to 37%.

The highest marginal rate of 37% will apply to individuals with taxable income exceeding $661,375 and married couples filing jointly with taxable income above $793,650.

The revised federal income tax brackets are as follows:

The standard deduction will also increase. Married couples filing jointly can claim $33,200, compared with $32,200 in 2026, while single taxpayers will receive a $16,600 deduction, up from $16,100.

These deductions reduce the income subject to federal taxation. According to CNBC, taxpayers calculate taxable income by subtracting the standard deduction or eligible itemized deductions from adjusted gross income.

The US tax system uses progressive rates, meaning each percentage applies to a particular portion of taxable income rather than the entire amount. The IRS periodically adjusts income thresholds using the consumer price index.

Inflation remains an important economic consideration behind the adjustments. The Bureau of Labor Statistics reported that the consumer price index increased 3.7% in September 2026 compared with the previous year, accelerating from 3.4% in August.

The IRS also revised provisions involving long-term capital gains, estate and gift tax exemptions, and eligibility for the earned income tax credit, although the CNBC report did not specify all the updated thresholds.

Separately, changes introduced through H.R. 1, formally identified as P.L. 119-21 and commonly called the One Big Beautiful Bill Act, have altered federal estate planning strategies. According to The Tax Adviser, the legislation established a permanent estate, gift, and generation-skipping transfer tax exemption of $15 million per individual or $30 million per married couple in 2026, with inflation adjustments.

The higher exemption reduces the number of estates expected to face federal estate taxes. IRS statistics cited by The Tax Adviser show that taxable estate tax returns totaled 2,584 in 2021, 3,170 in 2022, and 3,690 in 2023.

This development has increased the importance of balancing estate tax savings against potential income tax consequences when transferring wealth to heirs.

Under Section 1014 of the Internal Revenue Code, inherited assets generally receive a basis adjustment to their fair market value at the owner's death. This provision can reduce capital gains taxes when beneficiaries eventually sell inherited property.

Lifetime gifts generally transfer the donor's existing tax basis to the recipient. Consequently, transferring highly appreciated assets during life can create future capital gains exposure for beneficiaries, while retaining certain assets until death may preserve the potential basis adjustment.

The Tax Adviser explains that estate planning decisions depend on factors including the owner's age, estate size, expected asset appreciation, holding period, applicable tax rates, and asset characteristics. State-level transfer taxes and additional investment income taxes can also affect the calculations.

Highly appreciating investments may nevertheless benefit from lifetime transfers into intentionally defective grantor trusts. Although these assets generally retain their original tax basis, future appreciation can accumulate outside the grantor's taxable estate.

The Tax Adviser illustrates this strategy through a real estate enterprise whose owners transferred membership interests into such trusts when the business was valued at approximately $500 million. Twenty years later, its enterprise value had reached roughly $3 billion, leaving $2.5 billion in appreciation outside the owners' taxable estates.