Use this interactive Social Security Tax & COLA Calculator (2026): IRS Provisional Income & NY/NJ/PA Rules to model your exact 2026 tax, mortgage, or closing cost position across New York City, New York State, New Jersey, Connecticut, Massachusetts, Pennsylvania, and Florida. Click any 1-Click Benchmark pill inside the simulator to load verified East Coast scenarios, or click Copy Custom Scenario Link to share a deep-linked calculation.
Social Security COLA & Retirement Taxability Calculator
Computes IRS Provisional Income to determine whether 0%, 50%, or 85% of your Social Security benefits are subject to federal tax, plus NY/NJ/PA state exemptions.
For a 2,000-word line-by-line legal breakdown, worked household examples, and filing instructions, read our companion pillar report: Complete 2026 Statutory Guide & Case Studies →
2026 Statutory Parameters, Rates & Legal Citations
| Statutory Component | 2026 Rate / Limit | Application & Thresholds | Primary Authority |
|---|---|---|---|
| IRS Provisional Income Formula | AGI + Muni Interest + 50% SS | Includes tax-exempt municipal bond interest | IRC § 86(b)(1) |
| Single Filer 50% / 85% Thresholds | $25,000 / $34,000 | Unindexed since 1984 and 1993 statutory enactments | IRS Pub. 915 |
| Married Joint 50% / 85% Thresholds | $32,000 / $44,000 | Maximum 85% of benefit included in federal taxable income | IRS Pub. 915 |
| NY, NJ, PA, MA & DE State Tax on SS | $0 (100% Exempt) | Social Security benefits are completely exempt from state tax | NYS / NJ / PA Statutes |
| Connecticut & Rhode Island State Rules | Exempt Below AGI Caps | CT exempts SS below $75k Single / $100k Married AGI | CT DRS AN 2026 |
Frequently Asked Questions & Statutory Rules (2026)
How is IRS "Provisional Income" calculated for Social Security taxation?
Your Provisional Income (also called Combined Income on IRS Publication 915 worksheets) equals your Adjusted Gross Income (excluding Social Security) PLUS any tax-exempt municipal bond interest PLUS exactly 50% of your gross annual Social Security benefits.
Does the 85% tier mean the IRS takes 85% of my Social Security check?
No! It means up to 85% of your Social Security benefit is included in your taxable income and taxed at your marginal federal tax bracket (e.g., 12%, 22%, or 24%).
Do New York, New Jersey, or Pennsylvania tax Social Security benefits?
No. New York State, New York City, New Jersey, Pennsylvania, Massachusetts, and Delaware 100% exempt Social Security retirement benefits from state and local income tax regardless of how high your total income is.
Why do Roth IRA withdrawals help avoid the Social Security "Tax Torpedo"?
Qualified distributions from a Roth IRA or Roth 401(k) are excluded from Adjusted Gross Income and do not count toward IRS Provisional Income, allowing retirees to fund living expenses without pushing their Social Security benefits into the 50% or 85% taxable brackets.