IRA Calculator

Project Traditional or Roth IRA growth, apply IRS contribution limits, and estimate after-tax retirement value in today’s pounds.

Full original guide (expanded)

IRA Calculator

Compare Traditional and Roth IRA growth, apply contribution caps, and estimate after-tax retirement value. Results show nominal balances alongside estimated tax savings.

Author: Ugo Candido Reviewed by: Retirement Planning Editor Last updated: Category: Finance → Retirement

2024 limits: £7,000 base + £1,000 catch-up for age 50+

Results (today’s £)

Years invested—
Monthly contribution used£0
Projected balance£0
Total contributions£0
Total earnings£0
After-tax value (Traditional)£0
Estimated tax savings now£0
IRS cap applied—

Traditional Cap: 2024 Return: 7.0%

Methodology

The calculator compounds your current IRA balance and future contributions monthly using the annual return you provide. Contribution caps follow the selected IRS year; enable the cap toggle to limit annual deposits.

Formulas

Monthly rate: \( i = (1+r)^{1/12} - 1 \)

Future value of balance: \( FV_{0} = B_0 (1+i)^n \)

Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \)

Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)

How to Use

  1. Choose Traditional or Roth and enter your age, retirement age, and current balance.
  2. Provide annual contributions and optional IRS cap year.
  3. Set expected annual return and marginal tax rates.
  4. Review projected balance, earnings, tax savings, and after-tax value.

Frequently Asked Questions

Does the calculator distinguish Traditional vs Roth?

Yes. Traditional IRA balances are reduced by your retirement tax rate. Roth balances remain tax-free and show “N/A” for tax savings.

How accurate are the projections?

They assume constant monthly contributions and constant returns. Actual market performance and IRS limits may change.

Can I model catch-up contributions?

Yes. If you are age 50 or older, the IRS cap automatically includes catch-up amounts for the selected year.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\\]
','\
Formula (extracted text)
Monthly rate: \( i = (1+r)^{1/12} - 1 \) Future value of balance: \( FV_{0} = B_0 (1+i)^n \) Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \) Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

IRA Calculator

Compare Traditional and Roth IRA growth, apply contribution caps, and estimate after-tax retirement value. Results show nominal balances alongside estimated tax savings.

Author: Ugo Candido Reviewed by: Retirement Planning Editor Last updated: Category: Finance → Retirement

2024 limits: £7,000 base + £1,000 catch-up for age 50+

Results (today’s £)

Years invested—
Monthly contribution used£0
Projected balance£0
Total contributions£0
Total earnings£0
After-tax value (Traditional)£0
Estimated tax savings now£0
IRS cap applied—

Traditional Cap: 2024 Return: 7.0%

Methodology

The calculator compounds your current IRA balance and future contributions monthly using the annual return you provide. Contribution caps follow the selected IRS year; enable the cap toggle to limit annual deposits.

Formulas

Monthly rate: \( i = (1+r)^{1/12} - 1 \)

Future value of balance: \( FV_{0} = B_0 (1+i)^n \)

Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \)

Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)

How to Use

  1. Choose Traditional or Roth and enter your age, retirement age, and current balance.
  2. Provide annual contributions and optional IRS cap year.
  3. Set expected annual return and marginal tax rates.
  4. Review projected balance, earnings, tax savings, and after-tax value.

Frequently Asked Questions

Does the calculator distinguish Traditional vs Roth?

Yes. Traditional IRA balances are reduced by your retirement tax rate. Roth balances remain tax-free and show “N/A” for tax savings.

How accurate are the projections?

They assume constant monthly contributions and constant returns. Actual market performance and IRS limits may change.

Can I model catch-up contributions?

Yes. If you are age 50 or older, the IRS cap automatically includes catch-up amounts for the selected year.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\\]
','\
Formula (extracted text)
Monthly rate: \( i = (1+r)^{1/12} - 1 \) Future value of balance: \( FV_{0} = B_0 (1+i)^n \) Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \) Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

IRA Calculator

Compare Traditional and Roth IRA growth, apply contribution caps, and estimate after-tax retirement value. Results show nominal balances alongside estimated tax savings.

Author: Ugo Candido Reviewed by: Retirement Planning Editor Last updated: Category: Finance → Retirement

2024 limits: £7,000 base + £1,000 catch-up for age 50+

Results (today’s £)

Years invested—
Monthly contribution used£0
Projected balance£0
Total contributions£0
Total earnings£0
After-tax value (Traditional)£0
Estimated tax savings now£0
IRS cap applied—

Traditional Cap: 2024 Return: 7.0%

Methodology

The calculator compounds your current IRA balance and future contributions monthly using the annual return you provide. Contribution caps follow the selected IRS year; enable the cap toggle to limit annual deposits.

Formulas

Monthly rate: \( i = (1+r)^{1/12} - 1 \)

Future value of balance: \( FV_{0} = B_0 (1+i)^n \)

Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \)

Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)

How to Use

  1. Choose Traditional or Roth and enter your age, retirement age, and current balance.
  2. Provide annual contributions and optional IRS cap year.
  3. Set expected annual return and marginal tax rates.
  4. Review projected balance, earnings, tax savings, and after-tax value.

Frequently Asked Questions

Does the calculator distinguish Traditional vs Roth?

Yes. Traditional IRA balances are reduced by your retirement tax rate. Roth balances remain tax-free and show “N/A” for tax savings.

How accurate are the projections?

They assume constant monthly contributions and constant returns. Actual market performance and IRS limits may change.

Can I model catch-up contributions?

Yes. If you are age 50 or older, the IRS cap automatically includes catch-up amounts for the selected year.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\\]
','\
Formula (extracted text)
Monthly rate: \( i = (1+r)^{1/12} - 1 \) Future value of balance: \( FV_{0} = B_0 (1+i)^n \) Future value of contributions: \( FV_{c} = PMT \cdot \frac{(1+i)^{n}-1}{i} \) Traditional IRA after tax: \( FV_{\text{net}} = FV \cdot (1 - t_{\text{ret}}) \)
Variables and units
  • T = property tax (annual or monthly depending on input) (currency)
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft
Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog
  • 0.1.0-draft — 2026-01-19: Initial draft (review required).