UK Lifetime ISA (LISA 25% Bonus) & Stocks & Shares ISA Tax-Free Growth Calculator

Model £4,000/yr LISA + £1,000/yr (25%) UK government bonus compounding tax-free.

Projected LISA Corpus (With 25% Gov Bonus)
51,299.01 USD
Cumulative 25% Government Bonus 8,000 USD
Combined LISA + Regular ISA Corpus 112,857.83 USD
Unauthorized 25% Withdrawal Penalty 12,824.75 USD
Inputs
⚡ Scenarios:
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
currency/yr
Annual LISA contribution (up to £4,000/yr statutory LISA cap).
currency/yr
Additional contribution to standard ISA (total £20,000/yr ISA allowance).
%/yr
Expected annual tax-free investment return.
years
Years until first home purchase or retirement.
Results & Graph
Projected LISA Corpus (With 25% Gov Bonus)
51,299.01 USD
Cumulative 25% Government Bonus
8,000 USD
Combined LISA + Regular ISA Corpus
112,857.83 USD
Unauthorized 25% Withdrawal Penalty
12,824.75 USD

Projected LISA Corpus (With 25% Gov Bonus)

Graph 1 • UK Lifetime ISA (25% Bonus) • Domain Architecture & Live Telemetry Maps Annual Lisa Contribution, Additional Regular Isa Contribution, Expected Return Pct through UK Lifetime ISA (25% Bonus) Formula.
GLOBAL STATUTORY TAX & RET Projected LISA Corpus (Wit 51,299.01 USD Cumulative 25% Government 8,000 USD UK Lifetime ISA (25% Bonus) • Component Waterfall Projected LISA Corpus (With 25 51,299.01 USD Cumulative 25% Government Bonu 8,000 USD Combined LISA + Regular ISA Co 112,857.83 USD Unauthorized 25% Withdrawal Pe 12,824.75 USD
Graph 2 • Projected LISA Corpus (With 25% Gov Bonus) Across Annual Lisa Contribution Sweep (40% → 160%) Evaluates AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribut across 7 operating points (current input highlighted).
0 USD 28.2k USD 56.4k USD 20.5k 1.6k 30.8k 2.4k 41.0k 3.2k 51.3k 4.0k 51.3k 4.8k 51.3k 5.6k 51.3k 6.4k
Graph 3 • Joint Sensitivity: Annual Lisa Contribution × Additional Regular Isa Contribution Compares Projected LISA Corpus (With 25% Gov Bonus) when Additional Regular Isa Contribution is shifted +25% (solid) vs. −25% (dashed).
0 USD 28.2k USD 56.4k USD --- Additional Regular Isa Contribution @ 75% 35.9k -30% 43.6k -15% 51.3k +0% 51.3k +15% 51.3k +30%
Summary: Contributing USD 4,000.00/yr earns USD 1,000.00/yr in UK government bonus (USD 8,000.00 total bonus) and grows to USD 51,299.00 over 8 years.
Summary: Contributing USD 4,000.00/yr earns USD 1,000.00/yr in UK government bonus (USD 8,000.00 total bonus) and grows to USD 51,299.00 over 8 years.
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Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: UK Lifetime ISA (25% Bonus) Formula

AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribution) × 0.25
AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribution) × 0.25
  • annualLisaContribution: Annual Lisa Contribution (currency/yr)
  • additionalRegularIsaContribution: Additional Regular Isa Contribution (currency/yr)
  • expectedReturnPct: Expected Return Pct (%/yr)
  • savingHorizonYears: Saving Horizon Years (years)

Rounding: Currency outputs round to 2 decimal places; effective rates and multiples display to 2 decimal places.

Worked Example: Benchmark Scenario: UK Lifetime ISA (25% Bonus)

Model £4,000/yr LISA + £1,000/yr (25%) UK government bonus compounding tax-free.

  1. Enter your financial, equity compensation, or tax parameters.
  2. Evaluate the governing equation: AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribution) × 0.25.
  3. Review the primary result, supporting metrics, and 3 interactive SVG charts.
Result: Computes UK Lifetime ISA (25% Bonus) via AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribution) × 0.25.

Frequently Asked Questions

How does the UK Lifetime ISA (LISA 25% Bonus) & Stocks & Shares ISA Tax-Free Growth Calculator calculate results?

It evaluates AnnualInvestedWithBonus = AnnualContribution + min(4000, AnnualContribution) × 0.25 directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for a target amount?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Are my financial and compensation numbers kept private?

Yes. All calculations execute 100% locally in your browser with zero server transmission.

Finance & Investing · Global Statutory Tax & Retirement

UK Lifetime ISA (LISA 25% Bonus) & Stocks & Shares ISA Tax-Free Growth Calculator: inputs, method, and how to read the result

Model £4,000/yr LISA + £1,000/yr (25%) UK government bonus compounding tax-free.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
  • Annual Lisa Contribution: Annual LISA contribution (up to £4,000/yr statutory LISA cap).
  • Additional Regular Isa Contribution: Additional contribution to standard ISA (total £20,000/yr ISA allowance).
  • Expected Return Pct: Expected annual tax-free investment return.

What the calculation includes

With the default values shown, Projected LISA Corpus (With 25% Gov Bonus) is 51,299.01 USD. The calculation follows UK Lifetime ISA (25% Bonus) Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Annual Lisa Contribution from 4,000 currency/yr to 3,600 currency/yr changes Projected LISA Corpus (With 25% Gov Bonus) from 51,299.01 USD to 46,169.11 USD. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses published statutory rules, standard compounding conventions, and marginal tax rates entered by the user.
  • For educational and financial planning analysis; consult a CPA or qualified advisor for personalized tax filings.

Scope: Global / US / India / UK / Canada / Australia Statutory Standards Check the assumptions and limitations against your situation before relying on the estimate.

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