US retirement and tax tools for 2027
8 free tools. Each star is one of them; the most used shine brightest.
Better days, one tool at a time.
Plus beaux jours is French for “better days.”
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The tools in this topic people use most.
Medicare Advantage plan ending? Your deadlines
Answer two questions from your plan's letter and get your Open Enrollment, special enrollment and Medigap guaranteed-issue dates, plus a calendar file.
Federal rulesNewma-ending.plusbeauxjours.comLaunchedFed hike credit card calculator
See how the Sept 16, 2026 Fed hike changes your credit card APR, monthly interest and payoff date, with what-ifs for the next meeting. Uses Reg Z math.
Fed & Reg Z sourcesNewcard-apr.plusbeauxjours.comLaunched2027 Tax Brackets Calculator
Compare your federal tax under the 2026 and 2027 brackets and standard deduction, for your filing status and income, including the senior $6,000 deduction.
2027 brackets projectedNewtax2027.plusbeauxjours.comLaunched2027 Medicare Part D Cost Calculator
Estimate your 2027 Part D drug costs month by month: $700 deductible, 25% coinsurance, the $2,400 out-of-pocket cap, and Medicare Prescription Payment Plan bills.
Official 2027 numbers (CMS)Newpart-d.plusbeauxjours.comLaunched2027 401(k) Max-Out Calculator
Find how much to set aside from each paycheck to max out your 401(k) in 2027, including the 50+ catch-up and the age 60 to 63 super catch-up.
2027 limits projectedNew401k.plusbeauxjours.comLaunchedTrump Account checker
Enter a birth date to see if your child gets the $1,000 Treasury seed or the Dell $250, how to claim the account, and what it could grow to by 18.
Treasury & IRS sourcesNewtrump-account.plusbeauxjours.comLaunchedI bonds: buy in October or wait?
See whether buying I bonds in October or waiting for the Nov 1 rate comes out ahead for your amount, and the fixed rate that would make waiting worth it.
Forecast until Oct 14Newibond.plusbeauxjours.comLaunched2027 Social Security COLA Calculator
See your January 2027 Social Security check after the COLA and the Medicare Part B premium, and check whether you qualify for the $90 Medicare payment.
Forecast until Oct 14Newplusbeauxjours.com/colaLaunched
Every fall, the numbers that shape next year’s retirement checks and tax bills are announced within a few weeks of each other. The Social Security cost-of-living adjustment (COLA) is set from the change in the consumer price index for urban wage earners (CPI-W) over the third quarter and is usually announced in October. Medicare announces the coming year’s Part B premium in the fall, and because the premium is taken out of most Social Security checks, the COLA and the premium together decide what actually arrives in January.
The IRS publishes next year’s 401(k) contribution limits, its inflation-adjusted tax brackets and the standard deduction in October or November. Until each announcement, the tools here use a named forecast and say so with a dashed Projected label. On announcement day the tool switches to the official figure, the label turns solid and the update date changes.
Start with the COLA calculator if you receive Social Security, the 401(k) calculator if you want to max out next year’s contributions from each paycheck, and the tax brackets calculator to compare your federal tax under this year’s and next year’s brackets. None of them asks for your name or Social Security number, and the math runs in your browser.
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All 8 tools in this topic
Medicare Advantage plan ending? Your deadlines
Answer two questions from your plan's letter and get your Open Enrollment, special enrollment and Medigap guaranteed-issue dates, plus a calendar file.
Federal rulesNewma-ending.plusbeauxjours.comLaunchedFed hike credit card calculator
See how the Sept 16, 2026 Fed hike changes your credit card APR, monthly interest and payoff date, with what-ifs for the next meeting. Uses Reg Z math.
Fed & Reg Z sourcesNewcard-apr.plusbeauxjours.comLaunched2027 Tax Brackets Calculator
Compare your federal tax under the 2026 and 2027 brackets and standard deduction, for your filing status and income, including the senior $6,000 deduction.
2027 brackets projectedNewtax2027.plusbeauxjours.comLaunched2027 Medicare Part D Cost Calculator
Estimate your 2027 Part D drug costs month by month: $700 deductible, 25% coinsurance, the $2,400 out-of-pocket cap, and Medicare Prescription Payment Plan bills.
Official 2027 numbers (CMS)Newpart-d.plusbeauxjours.comLaunched2027 401(k) Max-Out Calculator
Find how much to set aside from each paycheck to max out your 401(k) in 2027, including the 50+ catch-up and the age 60 to 63 super catch-up.
2027 limits projectedNew401k.plusbeauxjours.comLaunchedTrump Account checker
Enter a birth date to see if your child gets the $1,000 Treasury seed or the Dell $250, how to claim the account, and what it could grow to by 18.
Treasury & IRS sourcesNewtrump-account.plusbeauxjours.comLaunchedI bonds: buy in October or wait?
See whether buying I bonds in October or waiting for the Nov 1 rate comes out ahead for your amount, and the fixed rate that would make waiting worth it.
Forecast until Oct 14Newibond.plusbeauxjours.comLaunched2027 Social Security COLA Calculator
See your January 2027 Social Security check after the COLA and the Medicare Part B premium, and check whether you qualify for the $90 Medicare payment.
Forecast until Oct 14Newplusbeauxjours.com/colaLaunched