Taxable social security benefits - Publication 915 Lump-Sum Election Method

[user17731832768]

Hi there,

Has anyone had experience with using Publication 915 Lump-Sum Election Method for taxable social security benefits? I am using the desktop version Turbo Tax 2025 and could not figure out how to elect this method. Turbo Tax always uses Form 1040 Social Security Benefits Worksheet. What I found is for the same information, Turbo Tax and H&R Block give significant taxable social security benefits.

Thanks in advance.

JJ

[AnnetteB6]

When you have received a lump sum Social Security payment in 2025 that applies to a prior year, TurboTax uses the method and worksheets found in Publication 915 to make the calculations necessary to include the correct amount of taxable Social Security on your 2025 return without needing to amend the prior year returns.

After you enter your information reported on your Form 1099-SSA, you will see a question about whether or not you received a lump sum payment.  If you did, answer 'yes' and you will enter the year for which the payment was received along with additional information from that year's tax return.  If you received a lump sum payment for more than one previous year, then you will go through this process for each year.  

The worksheets will be completed in the background to determine whether the lump sum payments are taxable or not.  You can see these worksheets by going to Forms at the top right section of the TurboTax screen.

Take a look at the following TurboTax help article to learn more:

What is a lump-sum Social Security payment?
 

[user17731832768]

@AnnetteB6 Thanks for your reply to the first part of my question.

@all The second part of my question is: What I found is for the same information, Turbo Tax and H&R Block give significant taxable social security benefits.

Anyone has experience on this and what did you find?

Kind regards,

JJ

[DaveF1006]

Can you clarify the second part of your question?

[user17731832768]

@DaveF1006 For the same information, Turbo Tax and H&R Block gave significant different taxable social security benefits. It feels like the % used to calculate the taxable social security benefits by two software is different. But I don't why. I only see the amount, not the %.

[CatinaT1]

We really can't address this because we can not see what you entered in TurboTax vs the other tax program. 

When entering lump sum payment you should answer "Yes" to the question "Did you receive any lump-sum payments?" in TurboTax. Answering "Yes" does not double-count your income; instead, it triggers a special IRS calculation known as the Lump-Sum Election, which can actually reduce your tax bill.

When you receive a lump-sum payment for a prior year (like the 2024 windfall repayment received in 2025), the IRS requires the full amount to be reported in the year you received the check. However, they allow you to use the "lump-sum election" method to prevent that large payment from pushing you into a higher tax bracket.

TurboTax uses the total from Box 3 as your starting point. When you select "Yes," the software will ask you to break down how much of that Box 3 amount was for 2024. It then recalculates your 2025 tax as if that portion had been received back in 2024.

If your income was lower in 2024 than in 2025, or if the lump sum would make more of your Social Security taxable this year, this election ensures you only pay the amount of tax you would have owed if you had received the money on time.

TurboTax will run the numbers both ways—taxing it all in 2025 versus using the lump-sum election—and will automatically apply the method that results in the lowest tax for you.

To complete this section accurately, have your 2024 Tax Return handy. TurboTax will ask for:

• The specific portion of the 2025 payment attributed to 2024 (found in the Description of Amount in Box 3 on your SSA-1099).
• Your 2024 Filing Status.
• Your 2024 Adjusted Gross Income (AGI).
• Any Tax-Exempt Interest you reported in 2024.

Follow these steps to ensure the election is applied:

1. In the Social Security (SSA-1099) section, enter the full amounts exactly as they appear on your 2025 form.
2. On the screen "Did you receive any lump-sum payments for 2024 or earlier?", select Yes.
3. Enter 2024 as the year the payment was for.
4. Enter the amount designated for 2024 from your form's description.
5. Follow the prompts to enter your 2024 return data.
6. Once finished, you can verify the result by viewing your 1040 (select Tax Tools > Tools > View Tax Summary > Preview my 1040). You will see a checkbox on Line 6c indicating the Lump-Sum Election was used.

[user17731832768]

@CatinaT1 Thanks and your answer is fair. I went through these steps. Still have a doubt why two softwares produce different taxable social security benefits. Do you know IRS only uses 50% and 85% to calculate the taxable amount, or there is other % and how it is determined?

[CatinaT1]

When determining how much of your Social Security benefit is subject to taxation, the IRS only uses 0%, 50%, and 85%. 

Here is how those percentages are determined and how the IRS handles the math when a lump-sum payment is involved:

• The IRS uses a specific formula called Combined Income to determine if you fall into the 0%, 50%, or 85% bucket.
• Your Combined Income is: Your Adjusted Gross Income (AGI) + Nontaxable Interest + 50% of your total Social Security benefits for the year.
• 0% Taxable: If your Combined Income is under $25,000 (Single) or $32,000 (Married Filing Jointly), your benefits are completely tax-free.
• Up to 50% Taxable: If your Combined Income is between $25,000–$34,000 (Single) or $32,000–$44,000 (Joint), up to 50% of your benefits become taxable.
• Up to 85% Taxable: If your Combined Income is over $34,000 (Single) or $44,000 (Joint), up to 85% of your benefits become taxable.
• The golden rule of Social Security is that the IRS can never tax more than 85% of your benefit, no matter how much money you make.

When you receive a lump-sum payment for back benefits it can artificially spike your Combined Income for the current year. This spike might unfairly push your benefits into the 85% taxable bracket, even though the money was meant for prior years when your income was lower. To fix this the IRS offers a special calculation method called the Lump-Sum Election.

Here is how the election works:

• You do not amend your old tax returns. You still report the entire lump sum on your current year's tax return.
• However, the IRS allows you to look backward. You take the portion of the lump sum that belonged to a prior year and apply the 0%, 50%, and 85% math to your income from that specific prior year.
• If your income was lower back then, a larger portion of the lump sum might fall into the 0% or 50% tiers.
• You calculate the taxable amount for each prior year, add those amounts together, and put that final total on your current year's tax return.
• If this backward-looking math results in a lower taxable amount, you are allowed to use it. TurboTax will calculate both methods automatically and apply the one that saves you the most money.

It is important to remember that 50% and 85% are not the tax rates you pay. They represent the portion of your Social Security money that gets added to your taxable income. Once that money is added to your income, it is taxed at your normal ordinary income tax bracket (such as 10%, 12%, or 22%).

[yelnoc]

Does Turbo Tax populate the Worksheets 1,2 and 4 required by Pub 519 to determine taxable amount of SSA benefits, other than the information required from my 2024 return.  As a retired fed I received a lump sum as a result of the  Social Security Fairness Act: Windfall Elimination Provision (WEP) and Government Pension Offset in 2025, and wish to  use the lump sum election method.

[DawnC]

Yes, you can enter your lump-sum SS payment in TurboTax.   @yelnoc    

Where do I enter an SSA-1099?

After you enter your SSA-1099 information, we'll ask if you received a lump-sum Social Security payment. 

If you did, answer Yes and follow the instructions. Your SSA-1099 lump-sum section breaks down the payments into what amount was received for each preceding year. You can only enter one year at a time.  If you need to enter benefits received for a different tax year, select Add another lump-sum payment.

While your lump sum may include benefit payments for more than one year, you do not have to file an amended tax return for any prior year.  You might need to pay taxes on a small portion of your lump-sum payment. However, you might be able to avoid these taxes by apportioning prior year benefits to those previous years’ income (still without filing any amended returns).

After you enter your lump-sum Social Security payment information, TurboTax will automatically figure out what, if any, taxes you owe due to the lump-sum payment.

[yelnoc]

Thanks but my main concern is does Turbo Tax populate the Worksheets required to claim the lump sum election?

[CatinaT1]

Yes. You will see this when you print all your forms and worksheets.

Here's how to get all the forms and schedules.

TurboTax Online:

1. Sign in to your TurboTax Account.
2. Scroll down to the "Your tax returns & documents" section.
3. Select the specific tax year you need.
4. In the left-hand menu, select Tax Tools > Print Center.
5. Select Print, save or preview this year's return.
6. The Key Step: Look for a checkbox or dropdown that says "Include government and TurboTax worksheets" or "All forms."
7. Click View/Print to generate the full PDF, which will now include every schedule (like Schedule C, D, or E) and the internal worksheets.

TurboTax Desktop:

1. If you used the software installed on your computer, you must open the specific program for that year.
2. Open your saved .tax file.
3. Go to File > Print.
4. In the print window, select the radio button for "All forms and worksheets."
5. Choose "Save as PDF" to keep a digital copy with every detail.

[yelnoc]

Thank you, the thing if Turbo Tax "fills out" the worksheets required by Pub 519 using 2025 and 2024 info it creates the backup needed to support the lump sum election in addition to calculating the tax on those SSA benefits.  HR Block software does not include those forms so this is crux of my decision on which to buy.