Note: The editors of Kiplinger's Personal Finance magazine and the Kiplinger Tax Letter are answering questions about the new tax law from subscribers to our free Kiplinger Today daily email. See other reader Q&As about the new tax law, or submit your own question.
Question: The new law changes inflation indexing from the CPI to something called the “chained CPI.” What impact will that have?
Answer: Many parts of the tax law – including the break points for the tax brackets, for example, and the size of the standard deductions – are indexed for inflation, meaning they are automatically adjusted upward to prevent inflation from imposing a sneaky tax increase. If your salary keeps up with inflation but the tax brackets were not indexed, sooner or later you’ll be pushed into a higher tax bracket. Indexing is designed to prevent such “bracket creep.”
From just $107.88 $24.99 for Kiplinger Personal Finance
Be a smarter, better informed investor.
Sign up for Kiplinger’s Free Newsletters
Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.
Profit and prosper with the best of expert advice - straight to your e-mail.
Until 2018, indexing was based on the basic CPI (Consumer Price Index), which uses the cost of a group of common goods as its gauge to measure inflation. Because consumers often change their buying habits in the face of price increases, the CPI allows for some substitution of similar goods. The chained CPI differs in that it uses a broader substitution method that stretches over a wider variety of different goods. The practical effect is that this method results in a slower rise in the cost of living. Proponents of the chained CPI consider it a more accurate measure of inflation. Critics see it as a hidden tax increase that compounds over time.
-
Markets Are Quiet Ahead of Fed Day: Stock Market TodayInvestors, traders and speculators appear to be on hold amid an unusually fraught Fed meeting.
-
Quiz: Test Your Knowledge of the OBBB, Wealth Transfer and Early RetirementQuiz The financial professionals who contribute to Kiplinger's Adviser Intel recently wrote about the OBBB's impact on retirement, how to ensure your wealth passes to your family and early retirement questions.
-
The Most Tax-Friendly States for Investing in 2025 (Hint: There Are Two)State Taxes Living in one of these places could lower your 2025 investment taxes — especially if you invest in real estate.
-
The Final Countdown for Retirees with Investment IncomeRetirement Tax Don’t assume Social Security withholding is enough. Some retirement income may require a quarterly estimated tax payment by the September 15 deadline.
-
Standard Deduction 2025 Quiz: How Much Do You Really Know?Quiz Test your knowledge of IRS rules that impact how much money you keep in your wallet.
-
IRS in Turmoil: GOP Budget Cuts and Staff Shake-Ups Threaten Taxpayer ServicesIRS Republican lawmakers advance a controversial budget bill that would gut IRS funding further, risking your 2026 tax filing season.
-
Cruise Lines Sue to Block Hawaii’s New Climate Tourism TaxState Tax Your vacation to the Aloha State could come at a higher price tag next year. Here’s why.
-
21 Last-Minute Gifts for Grandparents Day 2025 to Give Right NowHoliday Tips Last-minute gifting is never easy. But here are some ideas to celebrate Grandparents Day.
-
New $6,000 'Senior Bonus' Deduction: What It Means for Taxpayers Age 65-PlusTax Changes If you’re an older adult, a new bonus tax deduction could provide a valuable tax benefit. Here's how it works.
-
Claiming the Standard Deduction? Here Are 10 Tax Breaks For Middle-Class Families in 2025Tax Breaks Working middle-income Americans won’t need to itemize to claim these tax deductions and credits — if you qualify.
