Turn your payslip into a plan.

What it's for

An emergency fund is cash that stops a bad month turning into debt. It's for things you didn't plan for and can't put off: losing your job, a broken boiler, an urgent car repair, a vet bill.

It's not for holidays, Christmas or a new phone. Those are planned costs, so save for them separately.

How much

The common guideline is 3–6 months of essential spending. That means rent or mortgage, bills, food, transport and minimum debt payments, not everything you spend.

• Aim nearer 6 months if your income varies, you're self-employed, or your household relies on one income.
• 3 months can be enough if your job and income are very stable.

Where to keep it

• An easy-access savings account, separate from your current account so it's not easy to dip into.
• Not invested. Investments can fall at exactly the moment you need the money.
• UK bank and building society savings are protected up to £120,000 per person, per banking licence by the FSCS.

How to build it

1. Start with a starter fund, such as £1,000 or one month's essentials. That's enough to cover most surprises.
2. Set up a standing order on payday, so it builds without you thinking about it.
3. Once any expensive debt is cleared, build it up to your full 3–6 month target.

When you use it

Use it without guilt, because that's its job. Then pause any extra investing for a while to refill it.

Not all debt is the same

• Expensive debt includes credit cards, overdrafts, store cards, payday loans and missed buy-now-pay-later payments. Rates are often 20–40% APR or more. Clearing it is a guaranteed saving that's hard to beat.
• Cheaper, structured debt includes a mortgage and low-rate car finance. These have lower rates and fixed repayments, so there's usually no rush to overpay them ahead of everything else.

What order to pay debts off

Always pay the minimum on everything first. Then put any extra towards one debt at a time:

• Avalanche: the highest rate first. This saves the most money.
• Snowball: the smallest balance first. It costs a bit more, but early wins keep you going.

Pay off debt or invest?

If a debt's rate is higher than the return you'd realistically expect from investing (long-run averages are often quoted at around 5–8% for diversified funds), paying it off usually wins. A simple order that works for most people:

1. Build a small starter emergency fund.
2. Pay enough into your pension to get the full employer contribution. It's part of your pay (see guide 3).
3. Clear expensive debt, highest rate first.
4. Build your full emergency fund.
5. Invest for the long term through an ISA or pension (see guide 4).

Auto-enrolment: the basics

If you're employed, aged 22 or over and earn more than £10,000 a year, your employer must put you in a workplace pension. The legal minimum is 8% of your qualifying earnings (earnings between £6,240 and £50,270 a year):

• at least 3% from your employer
• the rest (5%) from you, including tax relief

The employer contribution is part of your pay

Your employer only pays in if you do. Opting out, or paying in less than your employer will match, means turning down money they've offered you. It's effectively a pay cut. Many employers pay more than the minimum if you raise your own contribution (for example, matching up to 5% or 6%), so check your staff handbook or HR portal.

Tax relief

Money you pay into a pension gets tax relief, so £80 from you can become £100 in your pension. It reaches you in one of two ways:

• Relief at source: your provider claims 20% from the government and adds it. Higher-rate taxpayers claim the rest through Self Assessment, and many never do.
• Net pay: your contribution is taken before income tax, so you get full relief straight away.

Salary sacrifice

You give up part of your salary, and your employer pays it into your pension instead. You save income tax and National Insurance, and some employers add their NI saving too.

• From April 2029, the NI saving will only apply to the first £2,000 sacrificed each year. Income tax relief isn't affected.
• A lower official salary can affect mortgage applications and some benefits, so check before making it large.

The catch: access

Pension money is locked until the minimum pension age. That's currently 55, rising to 57 from April 2028. That's why it's best for long-term money, alongside an ISA for goals before then.

Check your own payslip

Look for your pension deduction, and check your provider's app for the employer's contribution. Lost track of an old pension? Use the free GOV.UK Pension Tracing Service.

The account you use (the "wrapper") decides how your savings and growth are taxed. It doesn't change what you invest in.

ISAs: £20,000 a year, tax-free

You can pay up to £20,000 into ISAs each tax year (6 April to 5 April), split however you like. Growth and withdrawals are completely tax-free. Unused allowance doesn't carry over.

• Cash ISA: tax-free savings. From 6 April 2027, under-65s can put at most £12,000 of the £20,000 into cash ISAs.
• Stocks & Shares ISA: tax-free investing, usually in funds. Best for money you won't need for 5+ years, because the value can fall.
• Lifetime ISA: open it aged 18–39 and pay in up to £4,000 a year, and the government adds a 25% bonus (up to £1,000). It's only for a first home costing up to £450,000, or for after age 60. Other withdrawals cost 25%, which is more than the bonus. The government plans to replace it with a First-Time Buyer ISA from April 2028, so check the latest before opening one.

General investment account

There's no limit, but also no tax shelter. Growth and dividends above your yearly allowances can be taxed. Most people only need one after they've used their ISA allowance.

ISA or pension?

A pension gives you tax relief now and your employer's contribution, but the money is locked until 57. An ISA is flexible and you can use it any time. Most people benefit from both, in this order:

1. Pension up to the full employer contribution
2. ISA for goals in the next 5–15 years, and extra pension for retirement
3. A general investment account once your ISA allowance is used

The trap: lifestyle creep

When income rises, spending quietly rises to match: a nicer car, more takeaways, pricier subscriptions. None of it feels like a big decision, but a year later you earn more and save exactly the same.

1. Know the real number

A £3,000 pay rise isn't £3,000 more in your account. After income tax, National Insurance, student loan and pension deductions, a basic-rate taxpayer might see take-home rise by roughly £150–£180 a month. Plan with that figure. Above £50,270 you pay the higher 40% rate (thresholds differ in Scotland). Between £100,000 and £125,140, your tax-free allowance shrinks, so extra pension contributions there save unusually large amounts of tax.

2. Decide the split before it arrives

Pick a rule before your first bigger payslip. For example: half goes to your future (pension, ISA or debt) and half is yours to enjoy. You still feel the rise, and your future gets real momentum.

3. Automate it the same month

Raise your pension percentage or your ISA standing order before the new money lands in your account. Money you never see in your current account is easy not to spend.

4. Upgrade on purpose

Choose one or two things that genuinely improve your life, and let the rest stay the same. Deciding what to upgrade is very different from drifting into spending more.

Use the same approach for bonuses and windfalls.

In the UK, the main factors credit reference agencies weigh are:

• Payment history — paying on time, every time, matters most.
• Credit utilisation — using a small percentage of your available credit limit looks better than maxing it out, even if you pay it off monthly.
• Length of credit history — older accounts in good standing help.
• Types of credit and how often you apply — lots of applications in a short window can look risky.

A good score isn't a badge of honour — it mainly determines the interest rate you're offered on future borrowing, so it matters most right before you need a mortgage or loan.

Every calculator on this site uses a single steady return rate to make the maths visible — real markets don't behave that way. Two things worth internalising before you invest anything:

• Volatility isn't the same as loss. A diversified investment can drop 20–30% in a bad year and still recover over time — but only if you don't sell during the drop.
• Time horizon determines appropriate risk. Money you need within 1–3 years generally shouldn't be in the stock market at all; money you won't touch for 10+ years has more room to ride out volatility.

This site's calculators are for building intuition about compounding, not for predicting your actual future balance.