Calculators

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Let us do the hard work

See how a few pounds saved each month could snowball into a substantial nest egg, or run the numbers to see what income you might expect in retirement.

Be sure to read the important information at the end so you know what assumptions are being made.
Compound Interest ↓
Retirement Income ↓
Monthly Savings ↓
Mortgage Overpayment ↓
School Fees ↓
Inheritance Tax ↓
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Compound Interest

Often considered to be the eighth wonder of the world, compound interest is when you earn interest on your savings and on the interest you've already earned.

This has a snowball effect over time where your returns build substantially because you are earning interest on a larger amount as each year passes.

Try our Compound Interest Calculator.

Compound Interest Calculator

Whole pounds only.
Rate of expected investment growth. Compounds monthly.
Investment time horizon.
Deposit at the start of each month.
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Retirement Income

How do you know what income you might be able to rely on when you stop working?

Once you have an idea of how much capital you hope to have saved by your target retirement date, you now need to think about how it might grow in the future, and what rate of withdrawal is sustainable.

Try our Retirement Income Calculator.

Retirement Income Calculator

Expected total value of your savings, investments and pensions on retirement date.
Rate of expected investment growth (before fees).
Rate of income withdrawal each year.
Age when you plan to start drawing income.
Number of years to show on the chart.
Used to show results in today’s money and to index income if enabled.
When on, chart and KPI are adjusted for inflation at your chosen rate.
If on, your £ income increases each year by the inflation rate.
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Monthly Savings

The habit of saving regularly can be enormously rewarding.

Little and often, you can build up your savings until you reach your goal - maybe an overseas adventure, a family car upgrade or a house deposit.

For younger members of your family in particular, by breaking down a big-ticket item into bite-sized targets demonstrates patience and the benefits of planning ahead.

Try our Monthly Savings Calculator.

Monthly Savings Calculator

How much do you want to have by the target date?
Amount you’ve already set aside.
When will you begin saving?
When do you need the money?
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Mortgage Overpayment

Have you ever wondered how much interest you might save if you overpaid £100/month on your mortgage?

Or how many years you could shave off your mortgage term by paying an extra few hundred pounds each month?

Even small overpayments can bring debt-free living closer and free up future income for other goals.

Try our Mortgage Overpayment Calculator.

Montgomery Associates are not mortgage advisers. Read more.

Mortgage Overpayment Calculator

Outstanding mortgage today.
Nominal annual rate. Compounded monthly for this calc.
Whole years left on the mortgage.
Extra paid every month on top of the required payment.
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School Fees

Since January 2025 private and boarding school fees have been subject to VAT at 20%.

This has sharpened the focus of families, many of whom are exploring intergenerational gifting and making use of inheritance tax allowances.

Saving regularly, budgeting wisely and planning for inflation are more important than ever.

Try our School Fees Calculator.

School Fees Calculator

£
Total this term
£0
Next term
£0
Total this academic year
£0
Next academic year
£0
Total remaining fees
£0
Years of fees remaining
0
Monthly savings needed
£0
Peak annual fees
£0

Projected annual fees

Schedule

Academic Year Children Annual total
Total £0
Figures rounded to the nearest pound. Fees inflate each academic year; interest accrues monthly on savings.
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Inheritance Tax

Many families have been re-evaluating their finances after the 2024 Autumn Budget announcement that pensions would be liable to Inheritance Tax (IHT) from April 2027.

Try our calculator to estimate your position under pre-April 2027 and post-April 2027 rules.

For tailored advice, please contact us or see our Tax page for more information.

Note: taper relief, charitable gifts and exemptions are not accounted for.

Inheritance Tax (IHT) Calculator

Estate values (today)

£
£
£
£
£
£
£
£
*Business Relief / Agricultural Property Relief
£

Nil-rate bands

The value of an estate that is not subject to IHT
%
£325,000
%
£175,000
RNRB requires the home to pass to direct descendants and tapers above £2m.
Total assets
£0
Gross estate (scenario)
£0
Chargeable estate total
£0
IHT due
£0
Effective rate
0%

Estate breakdown (NRB/RNRB/Chargeable)

Calculation breakdown

IHT due£0
Notes & assumptions: RNRB capped at £175,000 per person and tapers by £1 for every £2 that the (liability-adjusted) estate exceeds £2,000,000; RNRB requires the home (or downsizing proceeds) to pass to direct descendants. Pensions included from 6 Apr 2027. Gifts logic simplified (gifts use NRB first; any excess charged at 40%; taper relief/exemptions not modelled). This tool is illustrative only and not tax advice. Your own circumstances may differ, so seek advice before taking action.
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Important information

The calculators shown on this page are beta versions only. The results and calculations are hypothetical and should be considered strictly as guidance. They do not constitute an offer or invitation to invest, nor should they be interpreted as advice or a recommendation.

Results are based on simplified assumptions (e.g. fixed rates, regular contributions) and do not necessarily account for fees, charges, taxation or inflation. All inputs on this page are anonymous, and no data is retained or stored.

Whether an investment is appropriate depends on your personal circumstances and objectives.

If you are unsure or would like clarity on your circumstances, please contact us.

Mortgages: Montgomery Associates do not offer mortgage advice so you should always seek advice from a mortgage broker or adviser who is suitably qualified.

Your home may be repossessed if you do not keep up repayments on your mortgage.

The value of an investment and any income from it can fall as well as rise, and you may not get back the amount originally invested. Past performance is not a guide to future performance.