Education Savings Calculator

What this calculator does and who it's for

This tool answers a single, practical question that keeps a lot of parents awake: how much do I need to put away each month to pay for my child's education? It is built for families facing private day or boarding school, international school, or a UK independent education — and it is especially useful for internationally mobile and expat families, whose fees are frequently paid in one currency, earned in another, and shaped by cross-border tax rules. Rather than simply multiplying today's fee by the number of school years, it projects the real future cost after fee inflation and then converts that target into a monthly savings figure. If you are mapping out longer-term family finances, it sits naturally alongside the rest of our financial planning tools and the wider financial planning hub.

How it works — the method behind the number

You give the calculator seven inputs: your child's current age, when school starts (age 5, 11 or 16), the annual fee in today's money, how many years of education you are funding, an assumed rate of fee inflation, anything you have already saved, and an expected annual investment return. From those it runs three calculations in sequence:

• It projects the fees. Each future school year is inflated on its own. A year paid eight years from now is grown by eight years of fee inflation; the year after by nine, and so on. Adding the inflated years together gives the total cost in future money — almost always well above the “today's money” total, and the gap between the two is shown as the fee inflation premium.
• It grows what you already have. Any current savings are compounded at your expected return up to the date school starts, and that future value is subtracted from the projected cost to leave the shortfall you still need to fund.
• It turns the shortfall into a monthly figure. Using a standard regular-savings (sinking-fund) formula, it spreads the shortfall across the months between now and the start date, assuming your contributions also earn the return you entered. The result is the headline monthly saving needed from now.

The results panel also breaks the first few school years down line by line, showing the inflated fee for each year and the running cumulative total, so you can see exactly where the target comes from rather than taking a single number on trust.

Reading your result — a worked example

Take the tool's default scenario: a three-year-old, secondary school starting at 11, a £35,000 current annual fee, 3.5% fee inflation, a 6% expected return, and nothing saved yet. There are eight years until school begins and seven years of fees to fund. In today's money the seven years total £245,000 — but once each year is inflated to the year it is actually paid, the projected cost rises to roughly £358,000. That extra ~£113,000 is the fee inflation premium: the part of the bill that exists purely because fees keep rising. Spreading £358,000 across the 96 months before school starts, with contributions growing at 6%, gives a required saving of around £2,900 a month. Change any input and the figure moves immediately — starting five years earlier, saving an initial lump sum, or funding fewer years all pull the monthly number down sharply, which is the real value of modelling it rather than guessing.

Assumptions and limitations to keep in mind

The estimate is deliberately simple, and a few assumptions are worth understanding. It targets building the entire projected cost as a lump sum by the day school starts, and does not credit the growth your pot would keep earning while fees are drawn down over the school years — so in practice the monthly figure it shows is on the cautious side. It applies your single assumed return to everything and does not model market volatility, so a real portfolio that rises and falls will not track the smooth line the tool draws. It ignores product and platform charges, and any tax on investment gains, both of which reduce net growth. And it shows the full published fee: bursaries, scholarships, sibling discounts and employer education allowances are not netted off, so if you expect any of those, reduce the annual fee you enter. Fee inflation itself is an assumption, not a promise — it varies by school and period — so it is worth testing a higher and a lower rate to see how sensitive your plan is.

Why it matters and what to do next

Education is one of the largest discretionary costs many families ever take on, and unlike a mortgage it arrives on a fixed timetable you cannot move. The earlier you start, the more of the work compounding does for you and the smaller each monthly contribution needs to be — which is exactly why seeing the number now, while there is still runway, is so valuable. For internationally mobile families there is a second layer: how you hold the money matters as much as how much you save. A common approach is an offshore investment bond, which allows gains to roll up largely tax-deferred and permits cumulative withdrawals of up to 5% of the original investment each year without an immediate UK income-tax charge; the bond can also be assigned to a child at 18, when they are often a lower-rate taxpayer, to manage tax on the gain. Our offshore investment bonds guide explains the mechanics, and you can model the withdrawal side with the offshore bond 5% allowance calculator. If university is the goal beyond school, the extra question of home-versus-international fee status is covered in our guide to university fee planning for globally mobile families. Because education funding rarely sits in isolation, it is worth checking how it fits your wider net worth and the currency in which your fee payments will actually be made.