Social Security COLA Estimator 2026: Benefit Increase Calculator
Figures last verified against official sources in July 2026.
Quick Answer
The Social Security Cost-of-Living Adjustment (COLA) increases monthly benefit checks each January based on CPI-W inflation. On an average $1,900 monthly check, a 2.8% COLA adds +$53.20/month ($638.40/year) in gross benefit before Medicare Part B premium offset deductions.
Seniors eager to know how inflation adjustments will impact their monthly budget don't want to wait until official SSA notices arrive in December. We built this COLA estimator to calculate your gross and net monthly check increases based on current CPI-W inflation projections.
- Social Security beneficiaries planning their upcoming annual budget around COLA increases.
- Seniors wanting to see how much of their gross COLA increase is absorbed by Medicare Part B premium hikes.
Social Security COLA Estimator 2026
Estimate your new monthly check size and net dollar increase after the annual Cost-of-Living Adjustment.
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How to Use This Estimator — Step by Step
- Enter your current monthly Social Security check amount. Input your current gross monthly check before Medicare Part B deductions.
- Select a projected COLA percentage. Select 2.8% (baseline projection) or test alternative inflation scenarios.
- Select Medicare Part B premium offset. Choose the estimated Part B increase to see your net spendable check.
- Click "Calculate COLA Increase." Review your new gross and net monthly check figures.
💡 Pro Tip
Log into your online my Social Security account in December to download your official COLA Notice letter showing your exact updated check amount. Access your account at ssa.gov/myaccount.
Official Government Sources Used in This Tool
| Source Name | What We Used It For | Direct Link |
|---|---|---|
| Social Security Administration — COLA Information Page | Official CPI-W calculation methodology and historical COLA rate tables | ssa.gov/cola |
| U.S. Bureau of Labor Statistics — Consumer Price Index (CPI-W) | Monthly inflation index data used to determine official COLA increases | bls.gov/cpi |
Seniors Audit is an independent educational platform. We are not affiliated with, endorsed by, or connected to Social Security or BLS.
Frequently Asked Questions About Social Security COLA
How is the annual Social Security COLA calculated?
The annual Cost-of-Living Adjustment (COLA) is calculated by the Social Security Administration using the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). SSA compares the average CPI-W from the third quarter (July, August, September) of the current year to the same period from the prior year.
When is the official Social Security COLA announced each year?
The Social Security Administration officially announces the annual COLA percentage in mid-October, immediately following the release of the September CPI-W inflation report by the Bureau of Labor Statistics.
When do COLA benefit increases take effect?
The COLA increase takes effect with benefits payable for December, which are deposited in January checks.
Why does Medicare Part B reduce my Social Security COLA increase?
For beneficiaries who have Medicare Part B premiums automatically deducted from their Social Security check, any increase in the standard Part B premium is subtracted from your gross COLA increase. However, the "Hold Harmless" rule ensures your net benefit check will not decrease year-over-year due to Part B premium hikes.
Is the COLA increase taxed by the IRS?
Yes. COLA increases add to your total gross Social Security income. If your Provisional Income exceeds $25,000 (single) or $32,000 (joint), up to 85% of your total Social Security benefit (including the COLA increase) remains subject to federal income tax.
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About This Educational Estimate: This tool is for educational purposes only. Seniors Audit uses the official formulas published by the relevant government agency, but results are estimates based on the information you entered. Rules, rates, and eligibility thresholds change annually and vary by individual circumstance.
If you have Medicare questions, a free SHIP counselor in your state can review your specific situation at no cost — find yours at shiphelp.org.
Seniors Audit is independent and not affiliated with any government agency or insurance company. We are not affiliated with, endorsed by, or connected to any government agency, insurance company, or financial services firm. All calculations use the official formulas and current figures published by the agencies listed above. We do not receive payment for referrals, leads, or any action taken by visitors to this site.