This way, the single filer is paying a top federal marginal income tax rate of 24% and not 32%. Outcome: She and her financial advisor decided to convert $35k instead of $80k to keep her from being hit with IRMAA in 2023, when she became eligible for Medicare. But you will pay higher rates if you earned more than $103,000 on your individual 2022 tax return or more than $206,000 on a joint return. 90 in 2023. I also have the Social Security COLA and the tax brackets for next year. In this post, we’ll delve into what IRMAA is, the income brackets for 2024, how the premiums. Your premium is based on gross income (MAGI). From 2022 to 2023 the CPI-U, if inflation remains constant, will increase by 5. Individuals $97,001-$123,000 or couples $194,001-$246,000 paid an additional $68 per month. IRMAA is a surcharge that people with income above a certain amount must pay in addition to their Medicare Part B and Part D premiums. 30 each, a combined amount of $1,156. If your income falls above a certain threshold, you will be subject to paying an Income-Related Monthly Adjustment Amount. What are the Medicare IRMAA brackets for 2024? the following show what the brackets could possibly look like as of this time they are not decided 2024 IRMAA if. gov. In 2023, surcharges for Medicare Part B range from an extra $65. 2024 Estimated Medicare IRMAA Brackets. The. 130(d),these amounts must be rounded down to the next lowest multiple of $50. Less than or equal to $194,000. 90. Poorly named IRMAA has everything to do with Medicare. You’ll also have to pay. Medicare is our country's health insurance program for people age 65 or older. Monthly Medicare Premiums for 2023. 10 from $135. 10:. Less than or equal to $91,000. This fact sheet discusses the provisions of the. The MAGI used to determine if the income-related monthly adjustment amount (IRMAA) applies is the most recent tax information that IRS is able. 90 in 2023. The annual deductible for all Medicare Part B beneficiaries will be $240. If your yearly income in 2021 was File individual tax return File joint tax return File married & separate tax return You pay (in 2023) $97,000 or less $194,000 or less $97,000 or less Your plan premium above $97,000 up to $123,000 above $194,000 up to $246,000The 2024 Medicare IRMAA surcharge kicks in when modified adjusted gross income exceeds $103,000 for single taxpayers or $206,000 for married couples filing jointly. The usual Half B premium is $164. For the 2024 predictions of IRMAA for 0% or 5%, and regardless of which of the above two monthly increases to the CPI-U that one uses from November 2022 to August 2023, and consistent with FactualFran's nudging, the predicted 2024 IRMAA brackets are exactly the same, due to rounding to the nearest $1000. Unlike Part B, the Part D IRMAA brackets will remain the same in 2022. Wages/ Interest. 60 for 2020, an increase of $9. The top marginal income tax rate of 37 percent will hit taxpayers with taxable. The number in brackets are 2024 projections based on 1 year of inflation growth annualized at 6. Call TTY +1 800-325-0778 if you're deaf or hard of hearing. Total Monthly Premium Amount. This fact sheet. IRMAA is simply a tax on those who earn too much income. The standard monthly premium for Medicare Part B enrollees will be $174. The income-related monthly adjustment amount (IRMAA) is the amount set by the federal government that determines how much you will pay monthly for Medicare Part B and Part D prescription drug coverage. Total Monthly Premium Amount. Join Date: Feb 2011. 2024 IRMAA Brackets (Projected) While we don’t have a crystal ball, it’s relatively simple to estimate the projected 2024 IRMAA brackets. These beneficiaries will also pay more. 80 from $164. Today, the Centers for Medicare & Medicaid Services (CMS) released the Calendar Year (CY) 2024 Advance Notice of Methodological Changes for Medicare Advantage (MA) Capitation Rates and Part C and Part D Payment Policies (the Advance Notice). If inflation is 0% from June 2022 through August 2023, these will be the 2024 numbers"The tax year 2024 adjustments described below generally apply to income tax returns filed in 2025. We live in a world where taxable income is more important than gross income because it dictates our income tax bracket. This means that the income thresholds for each bracket will remain at the same level as in 2021. Learn about the "Initial IRMAA Determination Notice," which Social Security sends you if you have Medicare Part B and/or Part D and Social Security determines that any Income Related Monthly Adjustment Amounts (IRMAA) apply to you. That full table is presented next. 60. The higher the beneficiary’s range of modified adjusted gross income (MAGI), the higher the IRMAA. 90 in 2023. The Centers for Medicare & Medicaid Services (CMS) released the premiums, deductibles, and coinsurance rates for the Part A and B programs, as well as the Part D income-related monthly adjustment amounts (IRMAA) for 2024 premiums. 60 and Medicare Part D monthly premiums by up to $76. 40 in total premiums and couples will save $124. These lower income retirees pay 25% of the Part B premium cost, while the Medicare program pays the other 75%. This can be seen in table 1. and this is the frustration - the inflation year goes from Sept 2023 - August 2024. 2. These income levels will rise yearly; the CRS report does not estimate the incomes. 50 while the average monthly premium for a basic Medicare. MAGI is not the same as your regular adjusted gross income (AGI); it includes additional sources of income like tax-exempt. 50 per month for Medicare Part B premiums and between $12. Income-Related Monthly Adjustment Amount: Total Monthly Premium Amount: Less than or equal to $97,000: $0: $97. For example, the highest income bracket for Part B now starts at $750,000 of MAGI, instead of $500,000. 2022 Taxes Will Determine 2024 Medicare IRMAA. 80 per month increase from the 2023 Part B premium of $164. 80 from $164. 90, higher-income individuals falling into IRMAA brackets may face additional costs. Here are the IRMAA income brackets for 2022 2023, and 2024. What is IRMAA for 2024? The income limit for IRMAA in 2024 is $103,000 for individuals and $206,000 for couples. 49, the Centers for Medicare & Medicaid Services (CMS) announced on July 31. 2024 IRMAA Updates: The standard Medicare Part B premium is set at $174. The. Example: Spreading out withdrawalsThe IRMAA Brackets in 2019 were: As it can been seen since 2007 the IRMAA surcharges have grown over time and in some ways they have grown substantially. 4% for 2024 returns, according to numbers from the the Internal Revenue Service. Standard monthly premiums are slated to rise by $9. Note: You may also pay a higher premium if you have a Part B or Part D late enrollment penalty. If your filing status and yearly income in 2021 was. Continue ReadingConvert as much as you can for 2023, 2024 and 2025. Oversimplifying, our taxable. 90 per month. The Income-Related Monthly Adjustment Amount (IRMAA) income brackets started being inflation adjusted in 2020. At $10,000 over the threshold, the tax rate is 23. Greater than $194,000 and less than or equal to $246,000. This payment is based on the individual’s modified adjusted gross. 60, and an annual total of. So Medicare should announce the official 2023 IRMAA brackets in November or December 2022. The costs will go up from the current $164. Here are the tax brackets for single filers in 2024: 10%: $0 to $11,600. The IRS increased its tax brackets by about 5. The IRMAA premium calculation is based on your modified adjusted gross income (MAGI) from two years prior. Supply: Medicare Prices, Medicare. 70 for 2024, an increase of $9. The revenue to your 2021 IRS tax go back (filed in 2022) determines the IRMAA you pay in 2023. The agency has boosted the income thresholds for each bracket, applying to tax year. The 2022 IRMAA tiers are likely to be published in mid-November 2021. Medicare Part D, which is drug coverage offered by private insurance companies, has a monthly premium that varies from. The revenue brackets are the similar. 50 $70. Greater than $366,000 and less than $750,000. 90 per month. Starting January 1, 2024, the interest rate for taxpayers with overdue payments will be: 10. So there is two years of (unknown) inflation. This will throw you into the top IRMAA bracket, increasing your spouse and your monthly 2024 Medicare Part B premiums to $578. The maximum allowable out-of-pocket cap for Medicare Advantage plans will increase to $8,850 in 2024 (in addition to prescription costs). The Centers for Medicare & Medicaid Services (CMS) has announced that the standard monthly Part B premium will be $174. Less than or equal to $87,000. Capital gains rates will not change in 2024, but the brackets for the rates will change. 8872 to $32. Review the parts of Medicare. 90 that beneficiaries pay. Still, you can make reasonable estimates and give yourself some margin to stay clear of the cutoff points. Previous Fact Sheet. Refer to the 2024 Medicare IRMAA Chart below for an idea of what Medicare costs you should. Calendar Year 2024 Participation in the Medicare Advantage Value-Based Insurance Design Model:. The income-related monthly adjustment amount (IRMAA) sliding scale is a set of statutory percentage-based tables used to adjust Medicare Part B and Part D prescription drug coverage premiums. After last year’s hefty. For beneficiaries in skilled nursing facilities, the daily coinsurance for days 21 through 100 of extended care services in a. 10, seniors who are hit with the surcharge will pay from $238. 70, increasing by about $9 from the previous year. 80 in 2024. Part D IRMAA. Preventative care. Besides the revisions to the brackets, the agency bumped up the standard deduction by $750 year over year to $14,600 for individuals, by $1,100 to $21,900 for. The Premium Amounts per IRMAA Bracket: According to the Medicare Board Trustees Report from 2019, the surcharges will inflate at as follows through 2028: Part B – 6. My capital gains tax would be $750, but my Part B and Part D IRMAA surcharges would remain at $860. This can add up to $839 more a year for Part B — in addition to the. IRMAA surcharges for Part B are. IRMAA 2025 is all about looking at your income and in retirement there are 2 different kinds of it as there are: Income that the government sees for IRMAA. Part D – 4. 70, an increase of $9. Banking, loans, investing, insurance, taxes, you name it. That beneficiary bracket would pay $157. 40, for a combined $1,610. The issue, though, is that your Social Security benefit pays for these IRMAA surcharges automatically. 2023 IRMAA Brackets. Getty Images. Capital gains rates will not change in 2024, but the brackets for the rates will change. 80 from $164. are considered Medicare Part D plans and members with higher incomes may be subject to the Medicare Part D Income Related Monthly Adjustment Amount (IRMAA), just as. What is IRMAA? Impact of MAGI on IRMAA; Navigating The. Today, the Centers for Medicare & Medicaid Services (CMS) released the Calendar Year (CY) 2024 Advance Notice of Methodological Changes for Medicare Advantage (MA) Capitation Rates and Part C and Part D Payment Policies (the Advance Notice). For 2023, the thresholds are $97,000 and $194,000. 90 from $144. Roth conversions in 2021, your MAGI. If inflation runs 0% for the next 11 months, then the IRMAA bracket would be $210,000. 90. The standard deduction, or the specific dollar amount that reduces the amount of income on which you’re taxed, is changing for 2024 as well. 90 in 2023. Half B Premium 2023 Protection (2021 Revenue) 2024 Protection (2022 Revenue) Customary: Single: <= $97,000IRMAA brackets for 2024 premiums. Married couples filing jointly and making over $182,000 will also pay higher. 90 in 2023. For 2024, if your income is greater than $103,000 and less than $397,000 the IRMAA amount is $384. The tax items for tax year 2024 of greatest interest to most taxpayers include the following dollar amounts: The standard deduction for married couples filing jointly for tax year 2024 rises to $29,200, an increase of $1,500 from tax year 2023. Schulte expects the 2024 IRMAA income thresholds to be $101,000 for singles and $202,000 for married couples. $144. 70 per month. “I have yet to see these thresholds drop,” says Diane Omdahl, president of 65 Incorporated, a Medicare advisory service. 3rd Surcharge Bracket: 7. 00 . None of the seven tax rates that make up the graduated brackets have changed since last year, though the thresholds themselves have been adjusted upwards. 49 in 2023 to $55. 1. The 2023 bracket increase should be higher than last year, due to inflation. This means that the IRMAA Brackets, by law, will increase at the same rate. IR-2023-203, Nov. 00. Medicare’s Income Related Monthly Adjustment Amount – IRMAA. On average the IRMAA Brackets have inflated from 2007 to 2021 as follows: 1st Surcharge Bracket: 4. $403,000 or greater $560. Similarly, the anesthesia conversion factor will be reduced from $21. If an individual’s income falls into a higher IRMAA tier, Medicare estimates your monthly premium in 2029 could cost you. Each year, the Medicare Part B premium, deductible, and coinsurance rates are determined according to provisions of the Social Security Act. Medicare beneficiaries who reported an individual income at or below $103,000 in 2022, or a married couple who earn no more than $206,000 per year in 2022, will now pay $174. 02%. Total monthly premium amount. In 2024, that standard Part B premium sits at $174. 22%: $47,150 to $100,525. The projected average total Part D beneficiary premium is projected to decrease by 1. Thefinancebuff. What Are the IRMAA 2023 Brackets (and How to Avoid It!) By: Taylor Schulte November 6, 2023. 1105. 28%, a slight increase from 2. Medicare Part B IRMAA The income-related monthly adjustment amount, or IRMAA, is a fee you pay on top of your Medicare. Another ugly bracket shifter is the Medicare B and D Premium income-related monthly adjusted amount,. There are five IRMAA income brackets depending on your income and filing status. Don’t assume nonqualified accounts should be used first in a liquidation order strategy. The annual deductible for all Medicare Part B beneficiaries will be $240 in. Understanding 2024 IRMAA Brackets. 60 per month per person on top of the standard Part B premium of $164. 90 plus the IRMAA surcharges as presented in the following table: Beneficiaries who file individual tax returns with 2021 modified adjusted gross income (MAGI) Beneficiaries who file joint. CMS appreciates the submitted comments and considered applicable comments as we finalized the policies contained in the 2024 Rate Announcement. CMS has released the following 2024 parameters for the defined standard Medicare Part D prescription drug benefit: Deductible: $545 (up from $505 in 2023); Initial coverage limit: $5,030 (up from $4,660 in 2023); Out-of-pocket threshold: $8,000 (up from $7,400 in 2023); Total covered Part D spending at the out-of-pocket expense threshold. 40 in additional monthly premiums for Medicare Part D prescription drug. The higher the beneficiary’s range of modified adjusted gross income (MAGI), the higher the IRMAA. I’m also sharing: What is IRMAA (and what does it stand for) How IRMAA. 8% in 2024, from $56. These beneficiaries will also pay more. IRMAA stands for Income Related Monthly Adjustment Amounts. the beneficiary’s adjusted gross income (AGI) (found on line 11 of the Internal Revenue Service (IRS) tax filing form 1040), plus. 80 from $164. The 2024 IRMAA MAGI income limits are straightforward:. Doing so can help keep you in a lower IRMAA bracket in subsequent years, notes. This fact sheet. Income (MAGI) in 2020 determines which bracket applies. I cover IRMAA in 2024 2025 Medicare IRMAA Premium MAGI Brackets. Let’s break down what this acronym means. $0. B. Each year, the Medicare Part B premium, deductible, and coinsurance rates are determined according to provisions of the Social Security Act. About 7% of Medicare beneficiaries pay IRMAA. The updated 2023 IRMAA brackets may increase Medicare Part B monthly premiums by up to $395. Total Monthly Premium Amount. For the 2024 predictions of IRMAA for 0% or 5%, and regardless of which of the above two monthly increases to the CPI-U that one uses from November 2022 to August 2023, and consistent with FactualFran's nudging, the predicted 2024 IRMAA brackets are exactly the same, due to rounding to the nearest $1000. Depending on which IRMAA Threshold you reach and what your Social Security benefit may be there is a good chance that your. Details on the five IRMAA brackets, whose income levels are adjusted each year: Those with income from $97,001 to $123,000 on an individual return or from $194,001 to $246,000 on a joint return will pay $230. Since they will file as married filing jointly, the following applies for 2023: The 2023 brackets won’t be out till this November, but I’m looking for 2024 (since that’s what 2022 income affects). If your income exceeds a specific. Each year, the Medicare Part B premium, deductible, and coinsurance rates are determined according to provisions of the Social Security Act. 50 in 2024. 10 in 2029. 2. gov defines income for IRMAA any your adjustable gross income (AGI) plus tax-exempt intertest you may have. Income-Related Monthly Adjustment Amount. Less than or equal to $194,000. Here are the IRMAA income brackets for 2022 2023, and 2024. Each year, the IRS adjusts tax brackets, the standard deduction and approximately 60 other tax provisions that are designed to adjust higher for inflation. 7442. You will receive notice from. Since I already have a blog post about IRMAA, which outlines the 2022 IRMAA brackets and thresholds, click that link to see what they are if you need to. In 2024, the limits rise to $161,000 for single filers and. The Part D IRMAA in 2024 will range from $12. The surcharge is called IRMAA, which stands for Income-Related Monthly Adjustment Amount. 0. The standard Part B premium for most people in 2024 is $174. com. That’s right, many soon-to-be retirees may not realize that they will have to pay more for Medicare Part B if their. For 2024, the IRMAA surcharge will be added to your premiums if your 2022 income was over $103,000 (or $206,000 if you’re married). If. 90 in 2023. Larger-income Medicare beneficiaries additionally pay a surcharge for Half D. Note: You may also pay a higher premium if you have a Part B or Part D late enrollment penalty. Find out if you qualify and how much you can save. The agency has boosted the income thresholds for each bracket, applying to tax year 2024 for returns filed in 2025. IRMAA is a tax on the rich. Note: The income levels used by Medicare to determine the 2024 rate will be from 2022 tax returns, unless a lower amount is requested in connection with a life-changing event . In 2023, the standard premium is $164. My total Medicare Part B premium for 2023 was set to climb from the standard $164. Maryland: 301-519-8041. 90 to $174. More info at the link provided for the other cost like IRMAA, Part B. 80 IRMAA surcharge) Medicare Part D Premium: $31. Our 2021 income was going to escalate my premiums by two levels with Aunt IRMAA—or so I was initially informed. Most people will pay the standard Part B premium amount. Marginal tax brackets for tax year 2024. At a $191,950 taxable income, your effective tax rate is closer to 18%, which is quite reasonable. 1. This fact sheet discusses the provisions of the. 80. Medicare Part B Premium: $329. Continue ReadingAmong other provisions, the Rate Announcement includes the following: Payment Changes/Growth Rates: The effective growth rate for 2024 MA non-End-Stage Renal Disease (ESRD) rates is 2. Medicare will make the official. 70 , an increase of nearly $10 a month. 8% from $56. 80 from $164. Some examples of income used for Medicare’s IRMAA income are: Social Security benefits. 80 from $164. The annual deductible for all Medicare Part B beneficiaries will be $240. This will throw you into the top IRMAA bracket, increasing your spouse and your monthly 2024 Medicare Part B premiums to $578. In 2023, the premium for Part B, medical insurance, is going down by $5. 70 for 2024, an increase of $9. Single: >= $500,000. Most taxpayers pay a maximum 15% rate, but a 20% tax rate applies to the extent that taxable income exceeds. The average total Part D premium is the sum of the average basic premium and the average supplemental premium for plans with enhanced coverage and is the most accurate current projection of what people will pay. Earlier this year, the Medicare trustees projected that the standard monthly Part B premium may increase to $174. The surcharge for Part B ranges this year from $68 to $408. For single filers, standard deductions are $14,600 in 2024, up from $13,850 this year. IRMAA is a consideration with two parts of Medicare — Part B and Part D. There are seven federal income tax rates, which were. $0 to $15,700. Medicare Part B rates. Your Income-Based Adjustment. The Medicare Part B deductible will raise to $240 in 2024. In 2024, beneficiaries must pay a coinsurance amount of $408 per day for the 61 st through 90 th day of a hospitalization ($400 in 2023) in a benefit period and $816 per day for lifetime reserve days ($800 in 2023). Then there was another $31. The lower your taxable income is, the lower your tax bill. 10, that results in IRMAA-affected beneficiaries paying. CY 2024 Medicare Hospital Outpatient Prospective Payment System and Ambulatory Surgical Center Payment System Final Rule (CMS 1786-FC) Nov 02, 2023. 80 from $164. gov. 2. Will Medicare premiums go up in 2024? In its annual report released in March of this year, the Medicare Trustees forecast monthly Part B premiums to increase from $164. For beneficiaries in skilled nursing facilities, the daily coinsurance for days 21 through 100 of extended care services in a. 4 x standard = between $208K and $260k Thoughts and A Few QuestionsAs a single filer, the ideal W2 income amount for 2024 is a taxable income of $191,950. Accounting for the impact of the benchmark rate cap, MA rebate and other. 70. 2024 IRMAA Brackets We have zero data point as of right now for what the IRMAA brackets will be in 2024 (based on 2022 income). When will Medicare Part B premiums for 2024 be announced? At the time of the Trustees Report the 2024 brackets for IRMAA Planning will be: Other beneficiaries pay Income-Related Monthly Adjustment Amounts (IRMAA), which vary by income level. Re: Max income without Irmaa premium. CAsage wrote: ↑ Thu Feb 23, 2023 5:38 pm Short answer, convert to the top of the MFJ 24% bracket, and don't worry about IRMAA (it's a relatively small percent tax surcharge, if you look at it that way). 80 from $164. The IRS has announced new income tax brackets for 2024. Learn how Social Security adjusts your monthly Medicare Part B and prescription drug coverage premiums based on your income and tax return. 80 from $164. Income-related monthly adjustment amount. 2024 IRMAA Brackets. 50. The impact is simple, the more you make the higher your Medicare costs. Heaven for bid deflation sets in, the bracket could be less than $210,000. Page 1 of 8 OMB No. 50 (monthly plan premium + $31. This notice tells you about income-related Medicare Part B and Part D premium adjustments for the coming year. The annual deductible for all Medicare Part B beneficiaries will be $240 in. If inflation is 0% from November 2022 by means of. Medicare Part B covers various outpatient services, including doctors, outpatient care, medical services such as physical and occupational therapy, and some home health care. The. Greater than $91,000 and less than or equal to $114,000. Calendar Year 2024 Participation in the Medicare Advantage Value-Based Insurance Design Model:. 00. U. $362. See page 5 for detailed information and line-by-line instructions. The annual deductible for all Medicare Part B beneficiaries will be $240 in. 6% of the total dollar bracket amount above $97,000. Stable premiums for Medicare prescription drug coverage in 2024 are supported. If your Modified Adjusted Gross Income (MAGI) as reported on your IRS tax return from 2 years ago (i. 90. 4th. 0% annually. Medicare Advantage enrollment is expected to continue to increase in 2024. IRMAA Percentage Tables, Medicare Part B Premium Year 2023 Short Summary. The 2023 bracket increase should be higher than last year, due to inflation. 90 per month for those in the lowest income-adjustment bracket. To determine whether you are subject to IRMAA charges, Medicare uses the adjusted gross income you reported on your IRS tax return two years ago. 10:. 06× 50%−25. When a person makes more than the allowed income amount, Medicare may add an IRMAA to the Part B premium, Part D premium, or both. 50/month premium surcharge, which amounts to $642/year of additional Medicare premiums. For more helpful information on Medicare, check out these frequently asked questions about Medicare plans. With IRMAA there are two pieces of good news: The income thresholds in the first 4 brackets have increased by just under 3. If your taxable income is greater than: Taxes owed. m. 90 in 2023. If you’ve got a good handle on that, then here’s what I meant by my quote, “if you make a lot of money or have a lot of money, you pay more for Medicare. 70 (normal $164. The IRMAA isn’t the cost of the premium, but the dollar amount added to the standard premium. 60 in 2020. What are the 2024 IRMAA Brackets? Nothing is official yet, but by law the IRMAA Brackets adjust according to the Consumer Price Index for Urban Consumers (CPI-U). The federal income tax has seven tax rates in 2024: 10 percent, 12 percent, 22 percent, 24 percent, 32 percent, 35 percent, and 37 percent. The surcharges are. Less than or equal to $97,000. A step-by-step walkthrough of how to use the Case Study Spreadsheet to estimate tax rates on Roth conversion with Social Security and Medicare IRMAA. The standard Medicare Part B premium for 2023 is $164. 90 to $81 a month, up $0. This is a. 50 a month extra for Part D drug coverage, although I take no medications. In 2024, with the inflation adjustment to the IRMAA brackets, you will no longer have a Part D or Part B IRMAA payment. 10/month in 2022 to $164. Leqembi is a treatment for those in the early. 43% from last year. An upper-income household in. Find out the income-related. 0. If you. 90 in 2023, which is down $5. Income brackets and surcharge amounts for Part B and Part D IRMAA For 2024, the income brackets for Part B and Part D are. 10. People intuitively want a higher COLA but a higher COLA can only be caused by higher. 70 to $4. Capital gains rates will not change in 2024, but the brackets for the rates will change. Consequently, people with an annual income under $170,000 who are at the low end of thei . IRMAA by Modified Adjusted Gross Income Total Monthly Part B Premium IRMAA Part D . If your income is above a certain limit ($97,000 if you file individually or $194,000 if you’re married and file jointly) (in 2024, $103,000 if you file individually or $206,000 if you’re married and file jointly), you’ll pay an extra amount in addition to your plan premium (sometimes called “Part D-IRMAA”). 4% for each type of tax filer for 2024, such as those filing separately or as married couples. Iowa Code Section 421. The standard monthly premium for Medicare Part B enrollees will be $148.