How to Use Backdoor Roth IRA Pro-Rata Calculator (Form 8606) Online for Free: Step-by-Step Guide
Work out the taxable part of a backdoor Roth conversion under the pro-rata rule. Free, private and no sign-up.
How to Use Backdoor Roth IRA Pro-Rata Calculator (Form 8606) Online for Free
Work out the taxable part of a backdoor Roth conversion under the pro-rata rule. This guide shows what Backdoor Roth IRA Pro-Rata Calculator (Form 8606) does, how to use it step by step, what to watch out for, and which related tools on shobfree.com can help next.
Quick answer
Open Backdoor Roth IRA Pro-Rata Calculator (Form 8606), type your numbers or pick the options you need, check the result that appears, and then use it. Backdoor Roth IRA Pro-Rata Calculator (Form 8606) is free, needs no account and runs in your browser, so what you type or add stays on your device.
What Backdoor Roth IRA Pro-Rata Calculator (Form 8606) does
- Work out the taxable part of a backdoor Roth conversion under the pro-rata rule.
- Enter your non-deductible IRA contribution, any after-tax basis from earlier years, the year-end value of your other traditional, SEP and SIMPLE IRAs and the amount you convert.
- The tool applies the Form 8606 pro-rata rule and shows how much of the conversion is taxable.
Enter your non-deductible IRA contribution, any after-tax basis from earlier years, the year-end value of your other traditional, SEP and SIMPLE IRAs and the amount you convert. The tool applies the Form 8606 pro-rata rule and shows how much of the conversion is taxable.
How to use Backdoor Roth IRA Pro-Rata Calculator (Form 8606), step by step
- Fill in the boxes. Type your numbers or pick the options you need.
- See the result. The answer updates right away as you change a value.
- Use it. Copy the result or note it down. Nothing is sent anywhere.
These three steps are the same on a phone and on a computer. If something looks wrong, change one setting and look at the result again; Backdoor Roth IRA Pro-Rata Calculator (Form 8606) updates as you go.
A worked example
A $7,500 non-deductible contribution converted right away with $93,000 left in a traditional IRA: total value $100,500, tax-free share 7.46%, so $560 of the conversion is tax free and $6,940 is taxable, which costs about $1,666 at a 24% rate. The remaining basis of $6,940 stays in the IRA.
Tips for a good result
- Double-check the units and the currency or period before you trust a number.
- Treat the result as an estimate and confirm important figures with the official source.
- Run a best case and a worst case, then keep both numbers for your planning.
- Change one value at a time, so you can see which input moves the result.
Who is this for?
Backdoor Roth IRA Pro-Rata Calculator (Form 8606) is useful for anyone who needs work out the taxable part of a backdoor Roth conversion under the pro-rata rule without installing software or paying for a subscription. Students, freelancers, office staff and small-business owners use tools like this for quick, one-off jobs where a full application would be too much.
Frequently asked questions
Which balance do I enter?
The value of all traditional, SEP and SIMPLE IRAs on December 31, not counting the amount you converted.
Do 401(k) balances count?
No. Only IRAs count, which is why rolling IRA money into a 401(k) removes it from the formula.
Is a backdoor Roth legal?
Yes. Congress left it in place; it must be reported correctly on Form 8606.
What if I wait to convert?
Growth between the contribution and the conversion is taxable. Convert soon after contributing.
Do I need to create an account to use Backdoor Roth IRA Pro-Rata Calculator (Form 8606)?
No. Open the page and start. There is no sign-up, no email and no payment.
Can I use Backdoor Roth IRA Pro-Rata Calculator (Form 8606) on my phone?
Yes. The page adapts to small screens, and everything runs in your phone's browser, so the same steps work on a laptop or a phone.
Related tools
- Canada Take-Home Pay Calculator: Estimate your salary after federal and provincial tax, CPP and EI.
- UK Self-Employed Tax Calculator: Estimate income tax and Class 4 National Insurance on your profit and what you keep.
- UK Pension Tax Relief Calculator: See the tax relief added to your pension and the extra you can claim as a higher-rate taxpayer.
- UK Pay Rise Calculator: See your new salary and how much extra you take home each month after tax and NI.
- Sales Tax Calculator: Add sales tax to a price, or take it out of a price that already includes it.
Privacy
Backdoor Roth IRA Pro-Rata Calculator (Form 8606) works inside your browser. Your files, text and numbers are not uploaded to a server, and there is nothing to delete afterwards.
