The Personal Savings Allowance, usually shortened to PSA, lets most UK savers earn a chunk of interest each year without paying any tax on it. It was introduced to take ordinary savers out of tax on their interest entirely, and for many people it does exactly that. But the allowance is not the same for everyone, it shrinks as your income rises, and it interacts with ISAs in ways that change how you should use your savings. This guide explains how it works and how to make the most of it.
What the Personal Savings Allowance is
The PSA is a band of savings interest you can earn each tax year with no Income Tax due on it. Interest within the allowance is tax-free. Only interest above your allowance is taxed, and then only at your normal Income Tax rate.
Crucially, the size of the allowance depends on your Income Tax band:
- Basic-rate taxpayers get the largest allowance.
- Higher-rate taxpayers get a smaller one, roughly half the basic-rate amount.
- Additional-rate taxpayers get no Personal Savings Allowance at all.
So the more you earn, the less savings interest you can receive tax-free, and the very highest earners lose the allowance entirely. This banding is the feature that catches people out when their income pushes them into a higher bracket.
What counts as savings interest
The PSA applies to most forms of savings interest, not just bank accounts. It generally covers:
- Interest from bank and building society accounts.
- Interest from savings accounts and many savings bonds.
- Interest distributions from certain funds.
- Some other forms of interest-like income.
Dividends from shares are not covered by the PSA. They have their own separate allowance and tax rates. So if your income comes from a mix of interest and dividends, the two are handled under different rules.
How the tax is actually collected
For most people, banks and building societies pay interest without deducting any tax, and HMRC works out whether anything is owed afterwards. If your interest stays within your allowance, there is nothing to pay and often nothing to do.
If your interest exceeds your allowance, HMRC usually collects the tax by adjusting your tax code, so it comes out of your wages or pension over the year, rather than asking for a separate payment. People who file a Self-Assessment return report their interest there instead. Our savings interest tax calculator shows how much of your interest falls within the allowance and how much would be taxed.
A worked picture
Imagine a basic-rate taxpayer with a sum in an ordinary savings account earning interest. As long as the interest stays within the basic-rate allowance, none of it is taxed, even though the account is not an ISA. The saver keeps every penny of interest.
Now suppose the same person gets a pay rise that pushes them into the higher-rate band. Two things happen at once: their allowance roughly halves, and any interest above the new, smaller allowance is taxed at the higher rate. The combination can mean that interest which was entirely tax-free before suddenly becomes partly taxable, which often surprises people the year they cross the threshold.
This interaction with your overall income is why it helps to look at savings interest alongside your salary. Our income tax calculator shows which band you fall into, which in turn tells you the size of your savings allowance.
The starting rate for savings
There is an additional feature for people with low earned income: a separate starting rate for savings, which can let you earn a further band of savings interest tax-free on top of the PSA. It is aimed at those whose income outside savings is low, and it tapers away as that income rises.
This mainly helps pensioners and others with modest earned income but meaningful savings. If your wages or pension are low, it is worth checking whether you qualify, because it can shelter a substantial amount of interest. For most people in steady employment, earned income is high enough that the starting rate does not apply.
How the PSA changes the case for a cash ISA
This is the practical heart of the matter. Before the PSA existed, a cash ISA was one of the few ways to earn savings interest tax-free. Now that most savers already get a band of interest tax-free outside an ISA, the cash ISA is less essential for smaller balances.
The reasoning works like this:
- If your total savings interest comfortably fits within your PSA, an ordinary savings account may pay a similar net return to a cash ISA, without using any of your ISA allowance.
- If your interest exceeds your PSA, or you expect it to as your savings grow, a cash ISA shelters the excess that would otherwise be taxed.
For many people this argues for using the limited ISA allowance on a stocks and shares ISA, where investment growth has no PSA-style shelter, and keeping easy-access cash in a high-rate ordinary account while the interest stays within the allowance. Our savings rate calculator helps you compare the returns of different accounts so you can judge whether an ISA or a standard account leaves you better off.
When the PSA can run out faster than you expect
A few situations push people over their allowance sooner than they assume:
- Larger balances. As savings grow, the interest they generate can exceed the allowance even at modest rates.
- Higher interest rates. When rates rise, the same balance produces more interest, so more savers breach the allowance.
- Moving up a tax band. Crossing into the higher-rate band halves the allowance and lifts the tax rate on the excess at the same time.
- Additional-rate income. Reaching the top band removes the allowance entirely, so all interest outside an ISA becomes taxable.
In any of these cases, an ISA becomes more valuable, because it shelters interest that the PSA can no longer cover.
Practical points to remember
- The allowance depends on your tax band. Basic-rate savers get the most, higher-rate savers about half, additional-rate savers none.
- It covers interest, not dividends. Share dividends have their own separate allowance and rates.
- Most tax is collected automatically. Usually through a tax code adjustment, not a separate bill, unless you file Self-Assessment.
- The starting rate for savings can add more room. Worth checking if your earned income is low.
- Watch the thresholds. A pay rise that changes your tax band can shrink the allowance and tax your interest at a higher rate at once.
Frequently asked questions
How much savings interest can I earn tax-free?
It depends on your Income Tax band. Basic-rate taxpayers get the full Personal Savings Allowance, higher-rate taxpayers get roughly half, and additional-rate taxpayers get none. Interest within your allowance is tax-free, and only interest above it is taxed at your normal rate.
Do I still need a cash ISA if I have a Personal Savings Allowance?
Not necessarily, for smaller balances. If your savings interest fits within your allowance, an ordinary account can match a cash ISA’s net return without using your ISA allowance. A cash ISA becomes more useful once your interest exceeds the allowance or you expect it to as savings grow.
How is the tax on excess savings interest paid?
For most people HMRC collects it by adjusting your tax code, so it comes out of your wages or pension over the year rather than as a separate bill. People who complete a Self-Assessment return report and pay it through that instead.
Does the Personal Savings Allowance cover dividends?
No. The PSA applies only to savings interest. Dividends from shares have their own separate allowance and their own tax rates, so the two types of income are taxed under different rules.
The Personal Savings Allowance quietly takes most savers out of tax on their interest, which is good news but also changes the old rules of thumb. Because ordinary accounts can now pay interest tax-free up to your allowance, the cash ISA is no longer automatically the best home for savings. Knowing your allowance, watching the thresholds, and steering your ISA room towards investments where there is no other shelter is how you keep the most of what your money earns.