Instafill.ai
7 days free
AI form filling · 26 fields · 1 page · done in seconds

Yes! You can use AI to fill out Form 8959, Additional Medicare Tax

Don't type 26 fields by hand. Tell our AI about yourself, or upload a document you already have, and it fills every field in seconds. You check it, then download, print or sign.

7 days free, then $19.99/month · Cancel anytime
AI fills it, no typingEncrypted, never used to train AICancel in two clicks
Form 8959, Additional Medicare Tax, page 1
Basic · 37/100Form Complexity Index

The AI does the filling. You just check it.

No typing into boxes, nothing to install.

Tell the AI about youAnswer a few questions in plain words, or upload a document you already have. That is all the typing there is.
AI fills every field in secondsIt puts each answer in the right box on every page, checkboxes included.
Check it and downloadReview every field, change anything, then download, print or sign the PDF.

What this form asks for

The AI fills all of it, from your answers or your documents.

Form 8959, Additional Medicare Tax, is used to report and calculate the Additional Medicare Tax owed by individuals with high income. This form is important for ensuring that the correct amount of tax is paid based on Medicare wages and self-employment income.
Fillable fields26
Pages1
Sections6
Form Complexity IndexBasic, 37/100

The AI checks your answers before you download

15 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Ensures that the Medicare wages and tips from box 5 of all Forms W-2 are accurately totaled and entered in Part I.

The software ensures that the total amount of Medicare wages and tips reported in box 5 on all Forms W-2 is accurately calculated. It verifies the sum of these figures and confirms that the total is correctly entered into Part I of the Additional Medicare Tax form. This check is crucial to determine the correct base amount subject to the Additional Medicare Tax. The software also cross-references the individual W-2 forms to prevent any discrepancies or omissions in the total reported amount.

Confirms that unreported tips from line 6 of Form 4137 are included in Part I, and if filing jointly, includes the spouse's amount.

The software confirms that any unreported tips, as calculated on line 6 of Form 4137, are included in the computation of Part I of the Additional Medicare Tax form. If the taxpayer is filing jointly, the software also ensures that the spouse's unreported tips are accounted for. This validation is essential to ensure that all taxable tip income is considered when calculating the Additional Medicare Tax liability.

Verifies that wages from line 6 of Form 8919 are included in Part I, and if filing jointly, includes the spouse's amount.

The software verifies that wages reported on line 6 of Form 8919, which are subject to uncaptured social security and Medicare taxes, are included in Part I of the Additional Medicare Tax form. In cases of joint filing, it also checks that the spouse's wages from Form 8919 are incorporated. This step is vital for ensuring that all wages subject to the Additional Medicare Tax are accurately reported.

Calculates Additional Medicare Tax on wages by multiplying line 6 by 0.9% (0.009) as instructed in Part I.

The software calculates the Additional Medicare Tax by applying the 0.9% (0.009) tax rate to the wages entered on line 6 of Part I. This calculation is performed in accordance with the instructions provided for the Additional Medicare Tax form. The software ensures that the multiplication and subsequent tax amount are computed correctly, providing an accurate figure for the taxpayer's liability.

Ensures that self-employment income from Schedule SE, Part I, line 6 is accurately entered in Part II, combining amounts if multiple Schedules SE are present.

The software ensures that self-employment income reported on line 6 of Part I of Schedule SE is accurately transcribed into Part II of the Additional Medicare Tax form. If the taxpayer has filed multiple Schedules SE, the software combines these amounts to reflect the total self-employment income subject to the Additional Medicare Tax. This validation is critical for self-employed individuals to ensure their tax liability is calculated correctly.

Calculates Additional Medicare Tax on self-employment income

The AI ensures that the Additional Medicare Tax on self-employment income is calculated correctly. It multiplies the amount reported on line 12 by 0.9% (0.009), as instructed in Part II of the form. This calculation is crucial for determining the correct tax liability. The AI verifies the accuracy of the multiplication and the resulting figure to prevent any errors in tax computation.

And 9 more checks
  • Ensures accurate entry of RRTA compensation and tips
  • Calculates Additional Medicare Tax on RRTA compensation
  • Calculates total Additional Medicare Tax
  • Enters total Medicare tax withheld
  • Total Additional Medicare Tax Withholding
  • Reporting Total Additional Medicare Tax
  • Taxpayer Identification Information
  • Adjustments to Medicare Wages and Compensation
  • Attachment of Form 8959

Let AI fill out your Form 8959

No typing. Every field filled in seconds, checked, ready to sign.

7 days free, then $19.99/month · Cancel anytime

How to Fill Out Form 8959 Online for Free in 2026

What the AI walks you through.

  1. Visit instafill.ai site and select Form 8959.
  2. Enter your name and social security number.
  3. Fill in Medicare wages and tips from W-2.
  4. Complete the sections for self-employment income.
  5. Calculate the Additional Medicare Tax amounts.
  6. Sign and date the form electronically.
  7. Check for accuracy and submit the form.

Common Mistakes in Completing Form 8959

The ones the AI is built to catch.

Incorrectly reporting Medicare wages and tips from Form W-2, box 5 in Part I
Failure to accurately report Medicare wages and tips as shown on Form W-2, box 5, can result in underpayment or overpayment of the Additional Medicare Tax. To avoid this mistake, ensure that the figures entered in Part I, line 1a and 1b are identical to the amounts reported in Form W-2, box 5. It is essential to double-check these figures for accuracy to prevent potential tax issues.
Neglecting to include unreported tips from Form 4137 in Part I
Omitting unreported tips from Form 4137, Statement for Social Security Benefits (or other similar forms), can lead to underreporting of income and potential tax implications. To prevent this mistake, make sure to include all unreported tips in Part I, line 2a and 2b. Properly reporting all income is crucial to ensure accurate tax calculations and compliance.
Incorrectly entering wages from Form 8919 in Part I
Entering incorrect wages from Form 8919, which is used to figure the Additional Medicare Tax on wages not subject to withholding, can lead to incorrect tax calculations. To avoid this mistake, double-check the figures reported on Form 8919 and ensure that they are correctly entered in Part I, line 3a and 3b. This will help ensure that the Additional Medicare Tax is calculated accurately.
Calculating Additional Medicare Tax on wages incorrectly in Part I
Calculating the Additional Medicare Tax on wages incorrectly in Part I can lead to significant tax implications. This mistake can occur due to misunderstanding the tax calculation rules or incorrectly entering figures. To prevent this mistake, carefully follow the instructions provided in the form and double-check all calculations. It is also recommended to consult tax professionals or the IRS website for clarification on any complex calculations.
Failing to enter self-employment income from Schedule SE, Part I, line 6 correctly in Part II
Neglecting to accurately report self-employment income from Schedule SE, Part I, line 6, can lead to underpayment or overpayment of the Additional Medicare Tax. To avoid this mistake, ensure that the figures reported in Schedule SE, Part I, line 6, are correctly entered in Part II, line 1a and 1b. Properly reporting all self-employment income is crucial to ensure accurate tax calculations and compliance.
Incorrectly combining self-employment income in Part II
Taxpayers may combine their self-employment income from multiple sources incorrectly in Part II, leading to an inaccurate calculation of Additional Medicare Tax. To avoid this mistake, ensure that you correctly identify and report all self-employment income from each business or trade, and calculate the Additional Medicare Tax separately for each source. This will help ensure an accurate calculation of the total Additional Medicare Tax due.
Incorrect calculation of Additional Medicare Tax on self-employment income in Part II
Taxpayers may calculate the Additional Medicare Tax on their self-employment income incorrectly in Part II, leading to an underpayment or overpayment of tax. To avoid this mistake, make sure you understand the calculation rules for the Additional Medicare Tax on self-employment income and apply them correctly. This includes determining the amount of wages, compensation, and net earnings from self-employment subject to the tax.
Entering RRTA compensation and tips from Form W-2, box 14 incorrectly in Part III
Taxpayers may enter RRTA compensation and tips reported on Form W-2, box 14, incorrectly in Part III, leading to an inaccurate calculation of Additional Medicare Tax. To avoid this mistake, make sure you report the correct amount of RRTA compensation and tips in the correct box on the form. This includes reporting the total amount of RRTA compensation and tips for the tax year, not just the amount reported in box 14 of Form W-2.
Including spouse's RRTA compensation incorrectly in Part III
Taxpayers may inadvertently include their spouse's RRTA compensation in their own calculation of Additional Medicare Tax in Part III, leading to an overpayment of tax. To avoid this mistake, make sure you only report your own RRTA compensation and tips in Part III. This includes any compensation and tips you received as an employee, as well as any self-employment income subject to the Additional Medicare Tax.
Incorrect calculation of Additional Medicare Tax on RRTA compensation in Part III
Taxpayers may calculate the Additional Medicare Tax on their RRTA compensation incorrectly in Part III, leading to an underpayment or overpayment of tax. To avoid this mistake, make sure you understand the calculation rules for the Additional Medicare Tax on RRTA compensation and apply them correctly. This includes determining the amount of wages, compensation, and net earnings from self-employment subject to the tax.
Incorrectly adding amounts from lines 7, 13, and 17 in Part IV
Taxpayers may fail to add the amounts from lines 7, 13, and 17 correctly when calculating the Additional Medicare Tax in Part IV. Line 7 represents the total wages, compensation, and self-employment income. Line 13 represents the total amount of adjusted wages, compensation, and self-employment income. Line 17 represents the total amount of taxable Social Security benefits. To avoid this mistake, ensure that all the figures are accurately added and entered in the correct boxes. Double-check your calculations to ensure that the totals match the figures reported on Form W-2, box 6, and Form 1099-MISC, box 8b, respectively.
Reporting incorrect total Additional Medicare Tax on tax return
Taxpayers may report an incorrect total Additional Medicare Tax on their tax return. This error can occur when the taxpayer fails to include all the Additional Medicare Tax due, or when they report the wrong amount due to calculation errors. To prevent this mistake, carefully review the instructions for calculating the Additional Medicare Tax and ensure that all applicable amounts are included in the calculation. Double-check your calculations and compare them to the amounts reported on Form W-2, box 6, and Form 1099-MISC, box 8b, respectively.
Neglecting to enter total Medicare tax withheld as reported on Form W-2, box 6 correctly in Part V
Taxpayers may neglect to enter the total Medicare tax withheld as reported on Form W-2, box 6, correctly in Part V of the Additional Medicare Tax form. This error can result in an incorrect calculation of the Additional Medicare Tax. To avoid this mistake, ensure that the figure reported in Form W-2, box 6, is accurately entered in the correct box on the Additional Medicare Tax form. Double-check the figure to ensure that it matches the amount reported on Form W-2.
Including unreported adjustments to Medicare wages, RRTA compensation, or self-employment income in the calculation of Additional Medicare Tax
Taxpayers may inadvertently include unreported adjustments to Medicare wages, RRTA compensation, or self-employment income in the calculation of Additional Medicare Tax. This error can result in an overpayment or underpayment of the tax. To prevent this mistake, carefully review the instructions for calculating the Additional Medicare Tax and ensure that only the reported wages, compensation, and self-employment income are included in the calculation. Double-check your calculations and compare them to the amounts reported on Form W-2, box 1, and Form 1099-MISC, box 7, respectively.

Frequently Asked Questions About Form 8959

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 1 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your Form 8959.
Can I fill other forms too?
This plan is for your Form 8959: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
How do I cancel?
From your account, in two clicks, any time. No email, no call.
How does the AI fill out Form 8959?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of Form 8959, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is Form 8959 to fill out?
Form 8959 has a Form Complexity Index of 37 out of 100, in the basic tier: 26 fillable fields across 1 page. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of Form 8959, Additional Medicare Tax?
Form 8959 is used to calculate and report the Additional Medicare Tax (AMT) withheld from wages, tips, and other compensation. The AMT is a tax imposed on individuals whose income exceeds certain thresholds.
Who is required to file Form 8959?
Individuals, including self-employed individuals, who have wages, tips, or other compensation in excess of the threshold amounts for the year are required to file Form 8959 if they owe any Additional Medicare Tax. Employers are also required to withhold and report the tax.
What information is required in Part I of Form 8959?
Part I of Form 8959 requires the taxpayer's name, social security number, and total wages, tips, and other compensation for the year. Employers are required to report the wages, tips, and other compensation they paid to the employee on Form W-2.
What is the difference between Medicare wages and tips and wages from Form 8919?
Medicare wages and tips are wages, tips, and other compensation subject to the Medicare tax. Wages from Form 8919 are wages from tax-exempt interest and certain municipal bonds. The Medicare tax applies to both types of wages, but the Additional Medicare Tax only applies to Medicare wages and tips.
What is the Additional Medicare Tax rate for Medicare wages?
The Additional Medicare Tax rate for Medicare wages is 0.9% for individuals whose income exceeds the threshold amounts. The threshold amounts are $250,000 for married filing jointly, $125,000 for married filing separately, and $200,000 for all other individuals.
What is the filing status and corresponding threshold for Additional Medicare Tax on Medicare wages?
The Additional Medicare Tax applies to Medicare wages and Railroad Retirement Tax Act (RRTA) compensation. The threshold for single taxpayers is $200,000, and for married filing jointly, it is $250,000. For married filing separately, the threshold is $125,000.
What should be entered in Part II of Form 8959 for Self-Employment Income?
Part II of Form 8959 is used to report self-employment income. Enter your total self-employment income from all sources during the tax year. This amount should be reported on Schedule SE (Form 1040), Self-Employment Tax, line 1.
What is the Additional Medicare Tax rate for Self-Employment Income?
The Additional Medicare Tax rate for self-employment income is 0.9%.
What is the filing status and corresponding threshold for Additional Medicare Tax on Self-Employment Income?
The filing status and corresponding thresholds for Additional Medicare Tax on self-employment income are the same as those for Medicare wages. Single taxpayers have a threshold of $200,000, married filing jointly have a threshold of $250,000, and married filing separately have a threshold of $125,000.
What is the purpose of Part III of Form 8959 for Railroad Retirement Tax Act (RRTA) Compensation?
Part III of Form 8959 is used to report Railroad Retirement Tax Act (RRTA) compensation. This includes wages, salaries, and other compensation from employment in the railroad industry. Enter the total amount of RRTA compensation you received during the tax year.
What is the filing status and corresponding threshold for Additional Medicare Tax on RRTA Compensation?
The Additional Medicare Tax applies to individuals with modified adjusted gross income (MAGI) above certain thresholds. The thresholds vary depending on the filing status. For single taxpayers, the threshold is $200,000, and for married filing jointly taxpayers, it is $250,000. For other filing statuses, the thresholds are lower. Please refer to IRS Publication 505 for detailed information.
How is the total Additional Medicare Tax calculated?
The Additional Medicare Tax is calculated by applying a 0.9% rate to the amount of income above the applicable threshold. For example, if a single taxpayer has a MAGI of $220,000, the Additional Medicare Tax would be calculated on the $20,000 amount above the threshold. The calculation is as follows: $20,000 x 0.9% = $180 in Additional Medicare Tax.
What is the purpose of Part V of Form 8959 for Withholding Reconciliation?
Part V of Form 8959 is used to reconcile the amount of Additional Medicare Tax withheld from wages with the amount reported on the taxpayer's income tax return. If the withheld amount is less than the amount reported on the return, the taxpayer may be required to pay an additional amount. If the withheld amount is more than the amount reported on the return, the taxpayer may be entitled to a refund.
What is the difference between Medicare tax withheld and Additional Medicare Tax withholding?
Medicare tax is a 1.45% tax on wages and self-employment income. The employer is responsible for withholding Medicare tax from the employee's wages. Additional Medicare Tax is a 0.9% tax on wages, self-employment income, and RRTA compensation above certain thresholds. The employer is required to withhold Additional Medicare Tax from the employee's wages if the employee's wages exceed the applicable threshold.
Where should the total Additional Medicare Tax be reported?
The total Additional Medicare Tax should be reported on Form 1040, Line 56, or Form 1040-SR, Line 5. If the taxpayer is self-employed, the tax should be reported on Schedule SE, Line 3, and Schedule 1 (Form 1040), Line 5. If the taxpayer is required to file Form 8959, the total Additional Medicare Tax should be reported on Part III, Line 11.
What is the role of Form 1040, 1040-SR, 1040-NR, or 1040-SS in filing Form 8959?
Form 8959, Part III: Additional Medicare Tax, is used to report and calculate the Additional Medicare Tax for individuals with wages, compensation, or self-employment income in excess of certain thresholds. Forms 1040, 1040-SR, 1040-NR, and 1040-SS are the U.S. Individual Income Tax Return forms. When filing these forms, you may need to complete and attach Form 8959 if you are subject to the Additional Medicare Tax. Form 8959 provides the necessary space to calculate and report the tax.
What is the Paperwork Reduction Act Notice and where can it be found?
The Paperwork Reduction Act (PRA) Notice is a statement that explains the type and estimated amount of information collection and recordkeeping requirements in an IRS form or instructions. It is included in the instructions for most IRS forms, including Form 8959. The PRA Notice provides important information about the purpose of the collection, the type of information requested, the estimated time to complete the form, and the estimated burden on taxpayers. You can find the PRA Notice for Form 8959 in the instructions for the form, which can be downloaded from the IRS website or obtained by calling the IRS at 1-800-TAX-FORM (1-800-829-3676).
Encrypted in transit and at restNever used to train AIDelete your forms any time

Get your Form 8959 filled out by AI

$0 today. Cancel before Nov 1 and you pay nothing.

Other forms like this one

CAR forms: Form SSA-44, Medicare Income-Related Monthly Adjustment Amount - Life-Changing Event, Form I-90, Application to Replace Permanent Resident Card, Form 2441, Child and Dependent Care Expenses, Form WH-380-E, Certification of Health Care Provider, Form 4137, Social Security and Medicare Tax on Unreported Tip Income, Form 8919, Uncollected Social Security and Medicare Tax, Form CMS-1763, Request for Termination of Medicare Coverage, Form CMS-855O, Medicare Enrollment Application, Form CMS-460, Medicare Participation Agreement, Form CMS-4040, Request for Enrollment in Medicare Part B, Form WH-380-F, Certification of Health Care Provider, Form W-10, Dependent Care Provider’s Identification, Form 1099-K, Payment Card and Third Party Network Transactions, Form CMS-40B, Application for Enrollment in Medicare Part B, Form SS-5-FS, Application for a Social Security Card, Form REG 195, Disabled Person Placard, Form AR-11, Alien's Change of Address Card, Form I-905, Application for Authorization to Issue Certification for Health Care Workers, Form I-131A, Application for Carrier Documentation, Form DBQ, Scars/Disfigurement Disability Benefits

tax forms: W-9, Request for Taxpayer Identification Number and Certification, Form W-2, Wage and Tax Statement, Form 1040-X, Amended U.S. Individual Income Tax Return, Form 130, Taxpayer's Notice to Initiate an Appeal, Form 1040-C, U.S. Departing Alien Income Tax Return, Form 940, Employer’s Annual FUTA Tax Return, Form 720, Quarterly Federal Excise Tax Return, Form 982, Reduction of Tax Attributes, Form 4137, Social Security and Medicare Tax on Unreported Tip Income, Form 911, Request for Taxpayer Advocate Service Assistance, Form 8960, Net Investment Income Tax, Form 8919, Uncollected Social Security and Medicare Tax, Form 8801, Credit for Prior Year Minimum Tax, Form 990-T, Exempt Org Business Income Tax Return, Form 945, Annual Return of Withheld Federal Income Tax, Form 5330, Return of Excise Taxes, Form FTB 3514, California Earned Income Tax Credit, Form 100, CA Corp Tax Return, Form 8288, U.S. Withholding Tax Return, Form 540 2EZ, California Resident Tax Return

L.A. Care forms: Form SSA-44, Medicare Income-Related Monthly Adjustment Amount - Life-Changing Event, Form 2441, Child and Dependent Care Expenses, Form WH-380-E, Certification of Health Care Provider, Form 4137, Social Security and Medicare Tax on Unreported Tip Income, Form 8919, Uncollected Social Security and Medicare Tax, Form CMS-1763, Request for Termination of Medicare Coverage, Form CMS-855O, Medicare Enrollment Application, Form CMS-460, Medicare Participation Agreement, Form CMS-4040, Request for Enrollment in Medicare Part B, Form WH-380-F, Certification of Health Care Provider, Form W-10, Dependent Care Provider’s Identification, Form CMS-40B, Application for Enrollment in Medicare Part B, Form I-905, Application for Authorization to Issue Certification for Health Care Workers, DHS-6696-ENG, Minnesota Health Care Programs Application (MNsure/DHS), California Department of Social Services (CDSS) Community Care Licensing Child Care Forms Packet (LIC 9150, LIC 282, LIC 627, LIC 700, LIC 995A, CDPH 286, LIC 9227), State of Illinois Department of Human Services (IDHS) – Bureau of Child Care and Development Child Care Application (Form IL444-3455), Form CH-006: PA-BH-Res-PCS, Oregon Behavioral Health Support Program Plan of Care Authorization (Plan of Care Request for Behavioral Health Residential or Personal Care Services), State of Illinois Department of Children and Family Services Medical Report on an Adult in a Child Care Facility (CFS 602), Carer Payment and Carer Allowance – Medical Report (SA431) for a child under 16 years, Pennsylvania Application for Subsidized Child Care (CY 868)

Medicare forms: Form SSA-44, Medicare Income-Related Monthly Adjustment Amount - Life-Changing Event, Form SSA-44, Medicare Income-Related Monthly Adjustment Amount - Life-Changing Event, Form 4137, Social Security and Medicare Tax on Unreported Tip Income, Form 8919, Uncollected Social Security and Medicare Tax, Form CMS-1763, Request for Termination of Medicare Coverage, Form CMS-855O, Medicare Enrollment Application, Form CMS-460, Medicare Participation Agreement, Form CMS-4040, Request for Enrollment in Medicare Part B, Form CMS-40B, Application for Enrollment in Medicare Part B, Medicare Enrolment Application (Australia) – Enrol in Medicare, Re-enrol/Extend Eligibility, Enrol a Newborn, and Register for My Health Record, Form 8919, Uncollected Social Security and Medicare Tax on Wages, CMS-855I, Medicare Enrollment Application for Physicians and Non-Physician Practitioners, Form CMS-855R, Medicare Enrollment Application - Reassignment of Medicare Benefits, CMS-855R, Medicare Enrollment Application: Reassignment of Medicare Benefits, CMS-855R, Medicare Enrollment Application: Reassignment of Medicare Benefits, Medicare Enrollment Application for Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) Suppliers, CMS-855S, 42 CFR Part 489 - Provider Agreements and Supplier Approval (Centers for Medicare & Medicaid Services), CMS-855B, Medicare Enrollment Application for Clinics/Group Practices and Other Suppliers, CMS-855A, Medicare Enrollment Application for Institutional Providers, Form CMS-855A, Medicare Enrollment Application for Institutional Providers

7 days free, then $19.99/month · Cancel anytime