COLA Ledger

An independent reference — not affiliated with the Social Security Administration. Every figure traced to the government publication that produced it.

2015 Medicare Part B premium — $104.90

Standard monthly Part B premium, 2015

$104.90

Unchanged from 2014. The annual deductible was $147.

Standard premium
$104.90per month
Annual deductible
$147
Change on 2014
none
Highest tier
$335.705 income brackets

What it did to a Social Security payment

The Part B premium is withheld from the Social Security payment, so it lands in the same January as the cost-of-living adjustment and the two move against each other. A $2,000 monthly benefit in 2014 became $2,034 gross with the 1.7% adjustment — a rise of +$34. After the premium went from $104.90 to $104.90, the payment rose +$34, an effective 1.79%.

A $2,000 benefit through the 2015 adjustment and premium
20142015
Gross monthly benefit$2,000$2,034
Part B premium$104.90$104.90
Net payment$1,895$1,929

The full ledger for a $2,000 benefit at current rates carries the annual figures and the percentile context.

The 2015 income-related tiers

Anyone whose modified adjusted gross income on the 2013 tax return crossed the first threshold paid more than the standard premium. The adjustment is a flat dollar amount per tier, not a percentage of income, and it steps at the bracket boundary rather than phasing in.

2015 Medicare Part B income-related monthly adjustment, by 2013 modified adjusted gross income
SingleMarried filing jointlyAdjustmentTotal Part B
Up to $85,000Up to $170,000none$104.90
$85,001 to $107,000$170,001 to $214,000$42.00$146.90
$107,001 to $160,000$214,001 to $320,000$104.90$209.80
$160,001 to $214,000$320,001 to $428,000$167.80$272.70
$214,001 and above$428,001 and above$230.80$335.70

The 2015 brackets in detail, including the reconstruction check — every tier is verified against the statutory multipliers as well as against the notice.

Related

Sources and freshness

Every year page draws on that year’s own Federal Register notice, retrieved from govinfo rather than from cms.gov.

Figures effective 1 January 2015. Page figures last verified against the sources above on 10 August 2026. Corrections: the correction log · support@inventum.com.au