Why should my target amount be adjusted for inflation?

If you want to live on equivalent of $1,000,000 in 25 years, the actual price of goods will have risen. The solver first converts your real goal into a nominal goal, then calculates the required investment.

Investing

How Much Monthly SIP is Needed to Save £500,000?

Calculate the necessary initial systematic investment size to accumulate a real purchasing power of £500,000.

Calculator Inputs

Target Goal in Today's Value (£)

Target Horizon (Years)

Expected Annual Return (%)

Expected Inflation Rate (%)

Planned Step-Up rate (%)

Required Regular SIP

£1,386/mo

Required Step-Up SIP

£923/mo

with +5% step-up annually

Required Lumpsum Today

£171,112

To achieve a purchasing power equivalent to £1,000,000 today in 25 years, inflation will require your final nominal nest egg to reach £1,853,944. You can achieve this by starting a flat monthly SIP of £1,386, or by starting a smaller SIP of £923 and increasing it by 5% every year.

Compounding Path to Goal

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Return Scenario Comparisons

Conservative (-2%)

8.0% Return

£1.33M

£715.58K

Power Lost:46.1%

Expected (Base)

10.0% Return

£1.85M

£1M

Power Lost:46.1%

Optimistic (+2%)

12.0% Return

£2.63M

£1.42M

Power Lost:46.1%

Actionable Next Steps

Step-Up SIP Calculator

Inflation is eating 46% of your returns. Try increasing your investments annually to beat it.

Personal Inflation Calculator

National averages are misleading. Calculate your exact personal inflation rate based on your spending.

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Methodology: Mathematical FormulasData Sources: Inflation & Tax CitationsDisclaimer: Legal Disclosures

Calculation Methodology & Formulas

We solve for the required initial Systematic Investment Plan (SIP) contribution:

FV_nominal = FV_real × (1 + i)ⁿ

P_required = FV_nominal / [((1 + r_m)^months - 1) / r_m × (1 + r_m)]

Real-World Compounding Projections

Reaching a real $1,000,000 in 20 years

To buy what $1,000,000 buys today in 20 years (assuming 2.5% inflation), you need a nominal corpus of $1,638,616. To achieve this at 10% expected return, you must invest $2,165 per month.

Frequently Asked Questions (FAQ)

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