Savings Goal Calculator

Counting month by month

Each month two things happen: the balance earns interest, then your contribution is added. The calculation simply repeats that until the target is passed, which is why the answer is a whole number of months rather than a formula's decimal.

What the interest is actually doing

The working above compares your answer with how long it would take at 0 %. Over a short period the difference is small — interest needs time and a balance to work on. Over a decade it becomes significant.

For a goal two or three years out, the contribution is almost everything and the rate barely matters. For a goal twenty years out, the rate matters enormously. That is a useful thing to know when choosing where to put the money: a short-term goal belongs somewhere safe and accessible, because the extra return is not worth the risk of it being down when you need it.

Inflation is the missing figure

A target set today is in today's money. If the goal is a long way off, what you actually need will have risen. A rough approach is to use a real rate — your expected return minus inflation — which makes the answer come out in today's money too. At 5 % growth and 3 % inflation, put 2 % in the box.

Getting there sooner

Three levers, in rough order of how much control you have:

1. The monthly amount. Almost always the most powerful, and the one you decide. Twenty per cent more makes a visible difference to the answer.
2. The target. Worth asking whether the figure is the real requirement or a round number.
3. The rate. The least controllable, and chasing it introduces risk that can move you backwards.

Setting up an automatic transfer on payday is the single change that most reliably works, because it removes the monthly decision entirely.

Common uses

• Saving for a deposit or a large purchase.
• Building an emergency fund, commonly three to six months of expenses.
• Checking whether a deadline is realistic.
• Seeing what an extra amount a month buys you in time.

The working, step by step

Questions people ask

How is the time calculated?

Month by month. The balance earns interest, then the contribution is added, repeating until the target is passed.

Does the interest rate matter much?

For a short goal, barely — the contribution dominates. For a goal decades away it matters enormously.

How should I account for inflation?

Use a real rate: your expected return minus inflation. At 5 % growth and 3 % inflation, enter 2 %.

What is the fastest way to reach a target sooner?

Increasing the monthly amount, which is usually both the most powerful lever and the one you control.

Where should I keep short-term savings?

Somewhere safe and accessible. For a goal a couple of years out the extra return from risk is small, and being down when you need the money is a real cost.

This is arithmetic, not advice

Everything here is a calculation you could do on paper. It does not know your circumstances, your tax position, your other commitments or what else is going on in your life, and it is not regulated financial advice.

Real decisions involve things no calculator holds: fees, penalties, tax treatment, how secure your income is, what happens if rates move, and what you would do if something went wrong. For anything significant, talk to a qualified adviser who can see the whole picture.

Use these to understand the shape of a number and to check one you have been given.

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The figures stay in the page. There is no server behind this site to receive them, nothing is logged, and nothing is stored. That matters more here than on most pages: your salary, your debts and your savings are nobody else's business. The about page lists every request the site makes, read live from your own browser.