Money committed elsewhere
Property, renovations, debt repayment, vehicles, gifts and dream purchases reduce the cash available for the long-term pot. Some purchases may still have resale value, but this planner does not model that.
Start here
Start with the amount you actually have to plan
Choose a current lump-sum jackpot or enter your own prize. Then work through what you would spend, what you would keep in cash and what the remaining money may need to support.
1
Use a current lump-sum jackpotStart with your win
Use the amount that is actually available for you to allocate. Do not use the headline value of an annuity as though it were cash in the bank today.
Current EuroMillions jackpot£24 millionStored MLL data · confirmed 2026-10-06 21:30:04
Current UK Lotto jackpot£2.9 millionStored MLL data · confirmed 2026-10-03 20:15:04
Current EuroJackpot jackpot€120 millionStored MLL data · confirmed 2026-10-07 05:45:12
Current Australian Powerball jackpotA$60 millionStored MLL data · confirmed 2026-10-07 05:45:12
Current Canada Lotto Max jackpotC$80 millionStored MLL data · confirmed 2026-10-07 05:45:12
or enter your own amount
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Changing currency changes the display only; it does not convert exchange rates.
For an annuity-style prize, calculate the cash amount or payment stream first. This planner is for money available to allocate now.
2
Allocate the first big decisions
These are amounts taken out of the long-term pot because they are being spent, gifted or committed elsewhere.
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Only include debt you actually plan to repay from the win.
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The calculator subtracts the amount only; it does not model inheritance-tax or estate-planning consequences.
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Second homes, boats, watches, travel, hobbies or any other one-off purchase.
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Set aside cash — without pretending it has been spent
A reserve is still your money. This planner removes it from the long-term investment pot but keeps it visible as a separate part of the plan.
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Cash kept readily available for flexibility, emergencies or near-term spending.
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What would the new life cost each year?
Separate ordinary monthly lifestyle spending from extra annual costs created by property, travel, security, staff, professional fees or other commitments.
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For example larger-home running costs, extra insurance, travel, security, staff or recurring professional costs.
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See how long the money could last
The main result starts with no investment growth. You can then test simple growth and rising-spending assumptions if you want a wider scenario.
Optional: test investment growth and rising spending
Illustrative annual return Annual increase in spending
These are simple scenarios, not forecasts. Investment returns can be negative and the model does not deduct tax or investment fees.
Lottery payout planning
How much of the lottery win is left after the big purchases?
The result is easier to understand when the money is split into three jobs: what has been allocated to purchases or gifts, what is being held as a cash reserve, and what is still available as long-term capital.
Still yours, doing a different job
The reserve is not counted as spent. It is simply kept outside the return model, because readily available cash and long-term invested capital do not behave the same way.
The money carrying the future
This is the amount the model uses for return and lifespan calculations. The more ongoing lifestyle costs rise, the more work this pot has to do.
Important: a home or car is not literally “lost money”. The calculator is measuring how much cash remains available for the future, not your total net worth after buying assets.
Lottery interest calculator
Could the money left from a lottery win support your lifestyle?
The calculator compares your first-year lifestyle cost with an illustrative return, then projects the pot using the return and annual spending-growth assumptions you selected. This is scenario maths, not an investment forecast.
Investments can fall as well as rise
The FCA warns that investment returns are not guaranteed and can be negative. A smooth 4% or 5% path is therefore only a modelling device.
A fixed lifestyle is unrealistic over decades
The annual spending-growth control lets you test what happens when the same lifestyle costs more over time instead of assuming today's spending stays unchanged forever.
Compare the selected return with 0%
The result panel always shows a 0% return case alongside your chosen assumption. It is not a prediction — it simply exposes how dependent the plan is on investment growth.
After the first purchases
What happens to the money you do not spend?
The planner stops at the point where personal financial advice would begin. It shows what remains and what the pot may need to support; it does not tell you which investment, fund, bank or adviser to use.
Decide what the money needs to do
Income, future property, family support, inheritance, capital preservation and growth are different jobs. A real plan may split money across several of them.
Do not build everything around one return
The FCA says investment values can go down as well as up. Use several return assumptions and pay attention when a lifestyle only works in the most optimistic version.
Check the firm before using it
For UK regulated financial advice, the FCA says to check the firm and its permissions. A very large lump sum is exactly the kind of situation where personalised professional advice may be useful.
Continue with Investing & Wealth or take the pot from this planner into How Long Will My Lottery Money Last? for a deeper lifespan model.
What winners actually did
Where does the money really go after a big lottery win?
There are two useful kinds of evidence: current National Lottery winner guidance and older research showing broad spending patterns. The older figures are historical context, not a suggested allocation for a winner today.
£2.72bn on main homes
A Camelot-commissioned Oxford Economics study, reported at the time, found property was the largest category and 82% of the sampled winners had changed their main residence.
£2.125bn in investments
The study reported more than £2.1bn allocated to investments intended to maintain income across the wider winner population it modelled.
£1.17bn in gifts
Gifts to family and friends were another major category, which is why family help remains a separate input in the planner.
Take time before committing
The National Lottery's winners' adviser says most winners take time to consider what to do; mortgages, children and long-held dreams commonly feature in those decisions.
Research limitation: the 2012 study was based on research from 100 winners of £1m or more and then discussed the economic impact of the first 3,000 National Lottery millionaires. It should not be used as a current spending benchmark.
If the win became real
What Should You Do If You Actually Win the Lottery?
Do not treat the calculator as a day-one shopping list. Protect the claim, understand the tax and payout position, then use scenario planning once the amount and practical choices are clear.
Protect and validate the win
Follow the operator's claim process, protect the ticket or account and avoid turning an unvalidated result into promises or purchases.
Understand tax and payout
UK National Lottery wins are not taxed as income when paid, but income generated later can be taxable and large gifts can have inheritance-tax consequences.
Use regulated specialists where needed
The National Lottery says £1m+ winners receive access to legal and financial advice and a wellbeing expert, whether or not they choose publicity.
Common questions
Lottery Win Calculator FAQs
Answers to the main questions about prize amounts, cash reserves, spending, returns and what the model does not include.
What does this lottery win calculator work out?
It starts with the prize amount available to you, subtracts one-off allocations and a separate cash reserve, then models the remaining long-term pot against your ongoing lifestyle and selected return and spending-growth assumptions.
Can I enter my own lottery winnings amount?
Yes. Enter any amount you want to test, use a quick amount or select a compatible current jackpot shortcut.
Does changing the currency convert the figures?
No. The currency selector changes the symbol and number formatting only. It does not use a live exchange rate and does not convert the amounts already entered.
Can I use this for EuroMillions or UK Lotto?
Yes, if the figure you enter is the lump-sum prize amount available to plan from. For UK National Lottery prizes, the initial win is not taxed as income.
Can I use this for Powerball or another annuity-style jackpot?
Only after you identify the amount actually available to allocate. U.S. Powerball jackpot winners can choose an annuity or cash option; UK Powerball jackpot payments are structured differently. Use the relevant payout calculator before bringing the usable amount into this planner.
Does the calculator include tax on lottery winnings?
No. Tax treatment depends on the lottery, country and your circumstances. UK National Lottery wins are not taxed as income when paid, but income or gains generated afterwards can be taxable.
Why is the cash reserve not counted as spending?
Because it is still your money. The planner separates it from the long-term return model, but it remains visible in the allocation breakdown instead of being treated as money already gone.
Does the calculator include inflation?
It includes an optional annual spending-growth assumption. That is a simplified way to test rising costs; it is not a forecast of inflation and does not model individual prices separately.
Does it include investment fees or tax on investment returns?
No. The selected return is a simple scenario rate. Real returns may be reduced by fees and tax and can also be negative.
What do the 0%, 3%, 4%, 5% and 6% buttons mean?
They are illustrative annual return assumptions applied to the long-term pot. They are not savings rates, forecasts or recommended investment returns.
How is the lifespan calculated?
The model applies a monthly equivalent of the selected annual return, subtracts monthly lifestyle costs and increases those costs each year by the spending-growth assumption. It checks up to 50 years and reports when the pot reaches zero, if it does.
Why does the calculator also show a 0% return result?
It is a simple stress test. It shows how long the long-term pot lasts if there is no investment growth while spending follows the same growth assumption.
How much should I spend on a house after winning the lottery?
There is no universal percentage. The calculator is designed to show the consequence of any property budget you enter, including how much long-term capital it leaves and the ongoing lifestyle the remaining pot must support.
How much should I give family after a lottery win?
There is no universal amount. In the UK, large gifts can have inheritance-tax and estate-planning implications, so the calculator only models the cash amount and leaves the legal and tax questions to appropriate professional advice.
Should I pay off my mortgage after winning?
That depends on your mortgage, the size of the win and your wider plan. The planner now includes a dedicated debt or mortgage field so you can model the effect without assuming repayment is automatically the right choice.
What do real lottery winners spend their money on?
Historical UK research found major spending on property, investments and gifts. Current National Lottery guidance also notes that mortgages, children and long-held dreams commonly feature in winners' decisions. Individual winners vary enormously.
What should I do first if I really win?
Validate and protect the win, understand the operator's claim process and privacy choices, and avoid rushed commitments. For a very large win, use appropriate legal, tax and regulated financial advice before major decisions.
Is this financial advice?
No. It is an educational scenario tool. It cannot know your tax position, investment risk, family circumstances, future returns, inflation, fees or legal needs.
Continue the journey
What to Read Next After Planning a Lottery Win
Use the result as a starting point, then move to the part of the winner journey that answers the next question.
Winner hubWinning the LotteryFirst steps, privacy, family, money and the decisions that can wait → First purchasesWhat Winners Buy FirstHomes, cars, travel, gifts and the first spending decisions → InvestingInvesting & WealthExplore the job the money left may need to do → Next calculatorHow Long Will My Lottery Money Last?Stress-test the remaining pot in more depth → Annuity prizeUK Powerball Annuity CalculatorModel a 30-year Powerball jackpot before using this lump-sum planner → Reality checkBiggest Winner MistakesOverspending, promises, security and lifestyle creep →
Sources checked
Official guidance and winner research
The National Lottery — Lotto winners and life after winningWinner support, anonymity, tax on the initial prize and comments from Allwyn's winners' adviser. GOV.UK — Income Tax overviewConfirms National Lottery wins are not subject to Income Tax; later savings/investment income can be taxable. GOV.UK — Inheritance Tax and giftsCurrent rules on lifetime gifts and the seven-year framework. Financial Conduct Authority — Risk and returnsInvestment returns are uncertain and values can fall as well as rise. Financial Conduct Authority — Check a firmHow to confirm a UK financial firm is authorised and has the relevant permissions. Powerball — official FAQsCurrent U.S. cash/annuity structure and the different payment structure for UK Powerball jackpot winners. The Guardian — Camelot/Oxford Economics winner study, 2012Contemporary reporting of the historical spending and investment figures used in the research section.