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.
-
I'm 54 with a $320,000 IRA and will soon be self-employed, earning about $120,000 per year. How much should I be saving for retirement?We asked financial experts for advice.
-
This High-Performance Investment Vehicle Can Pump Up WealthLeave online real estate investing to the beginners. Accredited investors who want real growth need the wealth-building potential of Delaware statutory trusts.
-
3 Ways High-Income Earners Can Maximize Their Charitable Donations in 2025Tax Deductions New charitable giving tax rules will soon lower your deduction for donations to charity — here’s what you should do now.
-
An HSA Sounds Great for Taxes: Here’s Why It Might Not Be Right for YouHealth Savings Even with the promise of ‘triple tax benefits,’ a health savings account might not be the best health plan option for everyone.
-
New RMD Rules: Can You Pass This Retirement Distributions Tax Quiz?Quiz Take our RMD quiz to test your retirement tax knowledge. Learn about RMD rules, IRS deadlines, and tax penalties that could shrink your savings.
-
Ten Retirement Tax Plan Moves to Make Before December 31Retirement Taxes Proactively reviewing your health coverage, RMDs, and IRAs can lower retirement taxes in 2025 and 2026. Here’s how.
-
When to Hire a Tax Pro: The Age Most Americans Switch to a CPATax Tips Taxpayers may outsource their financial stress by a specific age. Find out when you should hire a tax preparer.
-
The Original Property Tax Hack: Avoiding The ‘Window Tax’Property Taxes Here’s how homeowners can challenge their home assessment and potentially reduce their property taxes — with a little lesson from history.
-
Social Security Tax Limit Rises Again: Who Pays More in 2026?Payroll Taxes The Social Security Administration has announced significant changes affecting millions as we approach a new year.
-
Three Critical Tax Changes Could Boost Your Paycheck in 2026Tax Tips The IRS predicts these tax breaks may change take-home pay in 2026. Will you get over $1,000 in tax savings?
