Future ISA Value

GBPNaN

Total Contributed

GBPNaN

Tax-Free Growth

GBPNaN

ISA Growth कैलकुलेटर — Current ISA Balance ₹50,000

With current isa balance of ₹50,000, the future isa value is GBP4,62,400.

Last updated: ·Source: HMRC ISA Allowance

Max £1,666/month (£20,000/year ISA allowance)

Future ISA Value

GBP2,80,657

Total Contributed

GBP1,25,000

Tax-Free Growth

GBP1,55,657

What is the ISA Growth Calculator?

Individual Savings Accounts (ISAs) allow UK residents to save or invest up to £20,000 per tax year completely tax-free — no income tax, no capital gains tax, no dividend tax on ISA returns. The power of compound growth inside an ISA wrapper over 20+ years is substantial.

Formula

Future Value = Initial × (1 + r/12)^(12×years) + Monthly × ((1 + r/12)^(12×years) − 1) / (r/12). All growth is tax-free in an ISA.
P
= Initial balance
M
= Monthly contribution
r
= Monthly interest rate
n
= Number of months

How to use the ISA Growth Calculator

  1. 1

    Step 1

    Enter your current ISA balance

  2. 2

    Step 2

    Set your monthly contribution

  3. 3

    Step 3

    Choose expected return rate

  4. 4

    Step 4

    Set investment period

  5. 5

    Step 5

    View projected tax-free growth

Reviewed by

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Frequently asked questions

What is the ISA allowance for 2025-26?

£20,000 per tax year across all ISA types (Cash ISA, Stocks & Shares ISA, Innovative Finance ISA, Lifetime ISA). You can split the allowance across types.

Is ISA growth really tax-free?

Yes. You pay no income tax, capital gains tax, or dividend tax on returns within an ISA. This is one of the most powerful tax shelters available to UK residents.

Sources

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Calculated with CalcCrack