Tax changes for 2026: every IRS limit and threshold in one place

The IRS adjusts dozens of tax limits for inflation every October and November. For 2026, the changes touch retirement contribution limits, standard deductions, tax brackets, HSA caps, Social Security benefits, and Medicare premiums — most increasing modestly from 2025 levels. This page collects the major 2026 figures in one place so you do not have to cross-reference multiple IRS publications. Every number here is pulled directly from the formulas that power FinanceCruncher calculators — when the IRS announces 2027 limits and those formulas are updated, this page updates with them.

For deeper explanations of any individual limit, each section links to a dedicated guide. Use this hub as a planning checklist: confirm your withholding and retirement deferrals still make sense under the new tables, then open the linked calculator when you need a personalized estimate rather than a national limit.

Inflation adjustments are not the same as tax-law rewrites. For 2026, most of what changed is the dollar thresholds that move automatically with IRS cost-of-living formulas — standard deductions, bracket edges, contribution caps, and Social Security amounts. Rate structures (10%, 12%, 22%, and so on for ordinary income; FICA employee rates) are unchanged unless Congress acts. That means your marginal rate may stay the same even while the income band for that rate shifts upward, which can leave you with a slightly lower effective tax on the same inflation-adjusted income.

Who should care most: anyone who contributes to a 401(k), IRA, or HSA; anyone who itemizes rarely and relies on the standard deduction; W-2 employees whose pay raises might push them across a bracket or Medicare surcharge threshold; freelancers and side-income earners who pay estimated taxes; and retirees watching COLA, Medicare Part B premiums, and the Social Security wage base. If you are combining households this year, pair this page with the marriage financial checklist.

Standard deduction 2026^[1]

The standard deduction rose again for 2026; use these amounts unless you itemize. Most filers take the standard deduction, so this single line often matters more than any niche credit. A higher standard deduction raises the income you can earn before federal income tax applies (after other adjustments), which is why annual COLA increases still matter even in years without rate cuts.

Additional standard deduction amounts for age 65+ or blindness also adjust for inflation. If you or a spouse qualify, confirm the extra amount on your software or Form 1040 instructions — those add-ons stack on top of the base figures in the table below. Taxpayers who itemize (large mortgage interest, state taxes subject to the SALT cap, charitable gifts, or medical expenses above the AGI floor) should still compare both paths; a rising standard deduction makes itemizing less attractive for borderline cases.

See → Standard deduction and federal tax brackets for 2026 for bracket tables by filing status.

Federal income tax brackets 2026^[1]

Progressive rates still apply — only the portion of taxable income inside each bracket is taxed at that rate. Single-filer thresholds for 2026 are below; married filing jointly, married filing separately, and head of household tables live in the dedicated brackets guide. When you get a raise, bonus, or side-income bump, the relevant question is usually “what is my marginal rate on the next dollar?” — not “what is my average rate on all dollars?” The raise calculator and side income tax calculator are built around that marginal-rate framing.

Single-filer thresholds for 2026:

For MFJ, MFS, and head of household tables — and marginal vs. effective rates — see → Standard deduction and tax brackets for 2026. Estimate your tax with your specific income at → Income tax estimator.

IRA contribution limits 2026^[2]

Traditional and Roth IRA dollar caps usually move together for a given year. Catch-up contributions for age 50+ are a separate add-on. Income phase-outs for Roth contributions (and deductibility rules for traditional IRAs when you have a workplace plan) are separate from the contribution dollar limit — hitting the contribution cap does not mean you are eligible to contribute to a Roth. Check phase-out ranges in the Roth guide linked below, and remember that the contribution deadline for a tax year typically runs through the April filing deadline of the following calendar year.

→ Roth IRA contribution limits for 2026 — income phase-outs, backdoor Roth, and over-contribution penalties. → IRA contribution deadline — when to contribute and last-minute strategies.

401(k) contribution limits 2026^[2]

Employee elective deferrals are the number most people mean when they say “the 401(k) limit.” Employer matches and profit sharing sit on top of that deferral and count toward the much higher Section 415(c) annual additions limit. SECURE 2.0’s higher catch-up for ages 60–63 (the “super catch-up”) is especially valuable for late-career savers who can temporarily push more into pre-tax or Roth 401(k) buckets. If payroll still uses last year’s deferral percentage, a limit increase may require a conscious election update to actually capture the extra room.

SECURE 2.0 introduced a higher catch-up limit for participants aged 60–63; the 2026 super catch-up amount is $11,250. → 401(k) contribution limits guide for detailed rules. → 401(k) contribution calculator to model your contribution and employer match.

HSA and HDHP limits 2026^[3]

HSA contribution caps rise with medical inflation measures and apply only if you have qualifying high-deductible health plan (HDHP) coverage. Self-only versus family limits are mutually exclusive for a given month of eligibility; mid-year coverage changes can require a prorated calculation. The age-55 catch-up is personal to each spouse with an HSA. HDHP minimum deductibles and maximum out-of-pocket amounts also update — those figures determine whether a plan is HSA-eligible, not how much you can contribute once you qualify.

Health FSA salary-reduction limits are listed for comparison. FSAs are use-it-or-lose-it (with limited carryover or grace-period exceptions) and generally cannot be paired with an HSA except for limited-purpose dental/vision designs. If you are choosing benefits at open enrollment, run the HSA calculator before you lock a contribution election.

→ HSA contribution limits for 2026 for detailed rules, employer contributions, and FSA comparison.

Social Security and Medicare 2026^[4][5]

The annual COLA adjusts benefits for inflation measured in the prior year’s third quarter. It applies automatically to retirement, disability, and SSI benefits starting in January. Medicare Part B premiums are set separately; in some years the premium increase absorbs much of a modest COLA for enrollees who are not protected by hold-harmless rules. Earnings-test limits for people who claim before full retirement age also update — relevant if you work while collecting benefits.

The 2.8% COLA reflects inflation measured in Q3 2025 using the CPI-W. It applies to Social Security retirement, disability, and SSI benefits effective January 2026. → Social Security COLA 2026 guide for earnings limits and the Medicare hold-harmless provision. → Social Security benefit estimator.

FICA tax rates and wage base 2026

Employee Social Security and Medicare rates are unchanged, but the Social Security wage base rises with national average wages. High earners pay Social Security tax on a larger slice of salary each year the base increases; Medicare has no wage base, and the additional Medicare tax still applies above fixed income thresholds that are not inflation-indexed. Self-employed workers effectively pay both halves of FICA through SE tax, with an income-tax deduction for half of SE tax.

For a full take-home pay calculation including FICA, federal income tax, and state tax, use → Paycheck calculator.

Common planning moves after the annual updates

After new limits publish each fall, a short checklist prevents leaving money on the table. First, raise workplace deferrals if you were already maxing last year’s 401(k) or if a raise created room under the new cap. Second, confirm HSA payroll elections against the new self-only or family maximum — many benefits portals default to the prior year. Third, revisit IRA contributions before the April deadline if you still have earned-income room. Fourth, update estimated tax worksheets if you are self-employed or have large 1099 income so quarterly payments track the new brackets and wage base.

Employees who only change withholding once a year should still glance at Form W-4 after a raise, marriage, or side-income jump. Retirees should read the COLA notice alongside the Medicare premium letter so the net deposit change is not a surprise. Investors comparing taxable yields can translate a quoted APY into an after-tax estimate using their marginal bracket from the tables above.

What to do with this information

If you have not already, check that your 401(k) deferral rate captures any limit increases for 2026. Run the annual financial checkup to walk through the core calculators with updated figures, or use the marriage financial checklist if you are combining finances. When you compare a HYSA, CD, or taxable investment, use the 2026bracket information to estimate after-tax yield. Bookmark this page — we refresh it each November after the IRS announces the following year's limits.

Prefer a topic hub instead of a tax spreadsheet? Start at retirement tools for contribution and pension decisions, or open the Calculator Finder if you know the job (“estimate a raise,” “plan quarterly taxes”) but not the slug. Every figure on this page is an estimate for education and planning — not personalized tax advice. Confirm amounts against IRS publications and your own return software before you file.