Coronavirus Read our latest advice

We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Gilts and corporate bonds explained

The pros and cons of gilts and bonds.

In this article
Why invest in gilts and corporate bonds? What are gilts, government bonds and corporate bonds? How do gilts and corporate bonds work?
What are the credit ratings of gilts and corporate bonds? How do I buy gilts and corporate bonds?

Why invest in gilts and corporate bonds?

If you want a better return than you can get on your cash savings, you will need to accept greater risk. To get the rewards that investing your money can offer, you have to be prepared to accept the risk of loss.

Fixed-interest investments are generally considered the next step up from cash and tend to be less risky than shares. Here, we explain what fixed-interest investments are, what kind of returns they might offer you, the risks you might encounter, how to invest and what role fixed interest might play in your investment portfolio.

Find out more: Which? investment portfolios – we have created a unique set of investment portfolios that can help you decide on the right mix of assets for you.


What are gilts, government bonds and corporate bonds?

Investing in gilts, government bonds and corporate bonds effectively means lending money to different bodies, be it companies or governments, which pay you a regular income in the form of interest for a set period of time, after which your loan must be repaid.

They are designed to pay you a steady income and tend not to offer opportunities for capital growth – at least, not in normal economic times. The most common forms of fixed-interest investment are:

  • gilts and index-linked gilts
  • other government bonds
  • corporate bonds
  • permanent interest-bearing shares (Pibs) and perpetual subordinated bonds (PSBs).


These fixed-interest securities are issued by the British government when it wants to raise money. Gilts are generally considered to be very low-risk investments because it is thought to be highly unlikely that the British government will go bankrupt and therefore be unable to pay the interest due or repay the loan in full.

Index-linked gilts pay interest linked to the Retail Prices Index (RPI), so their value rises with inflation.

Other government bonds

Government bonds are also issued by governments around the world to raise money. As the eurozone crisis demonstrated, some governments prove safer bets than others, as anyone owning Greek government bonds before the crisis will have found out.

Corporate bonds

Corporate bonds are issued by companies that are looking to raise capital. They are seen as riskier than gilts, as companies are generally considered to be more likely to default on debt than stable governments. Corporate bonds tend to offer a higher rate of interest to reflect this extra risk.

Permanent interest-bearing shares (Pibs)

Pibs are like corporate bonds but are mainly issued by building societies. Perpetual subordinated bonds are issued by building societies that have demutualised.

How do gilts and corporate bonds work?

A conventional UK gilt might look like this – "Treasury stock 3% 2020".

This shows the following:

The UK government wanted to raise £100 million; it would issue one million gilts at the value of £100 each. This is known as the 'nominal value' or 'par'.

Similarly, a corporate bond might look this – "Tesco PLC 4% 2018" – the issuer, coupon and redemption date.

Returns from gilts and corporate bonds

If you buy £1,000-worth of Treasury stock 3% 2020 gilts, you would receive 3%, or £30, every year until your £1,000 loan is repaid in 2020. The income you receive is called the 'income yield', 'running yield' or 'interest yield' and is paid twice a year (1.5% or £15 every six months, in this instance).

The coupon is determined by the length of time you must wait for maturity and/or the riskiness of the company within which you invest.

The further away the redemption date, the higher the interest you will receive, as you are having to wait longer to be repaid. Similarly, the greater the risk you take on a company, the higher the interest rate you can expect to receive.

Gilts and corporate bonds on the secondary market

You can buy gilts at issue from the government's Debt Management Office, but most gilts, government bonds and corporate bonds are traded on a secondary market, and their value can fluctuate based upon interest rates and the solvency of the issuer.

Bond prices will rise when general interest rates are low, because the rates of interest they pay are fixed and will beat the short-term rates available from banks.

Therefore, you may buy a bond or gilt for an amount above or below the nominal value, and this will have an impact on both how much interest you receive as an income and the amount of money you will receive when the bond matures.

It works like this:

  • If, for example, you paid £95 for a gilt, government bond or corporate bond with a nominal value of £100, you will make a capital gain when it matures, as the loan is repaid at the nominal value.
  • Similarly, if you bought the gilt, government bond or corporate bond for £105, you would lose out on maturity, as you're only paid back at the nominal value.
  • The amount of interest you'll receive will also change dependent on the price you paid. If you buy a bond or gilt paying 6% for, say, £95, the effective interest rate you'll receive is higher than 6% as interest is paid on the nominal value, not the second-hand market price you paid.
  • In this example, the rate you receive is actually 6.32% (i.e. 6%/£95 = 6.32%).

What is the 'redemption yield' of a gilt or corporate bond?

The redemption yield is a rate of return that combines the interest rate you get based on the price at which you buy the gilt, government bond or corporate bond, and the profit or loss you get if you hold the bond to maturity.

If you bought a gilt, government bond or corporate bond at a price that's lower than the launch price (£100), the redemption yield will be higher than the running yield, as you're set to make a profit when the bond matures.

Conversely, if you bought a gilt, government bond or corporate bond at a price that's higher than the launch price (£100), the redemption yield will be lower than the running yield, as you'll make a loss if you hold the bond to maturity.

What are the credit ratings of gilts and corporate bonds?

Gilts, government bonds and corporate bonds are given credit ratings by companies, such as Standard and Poor's, and Moody's.

Investment-grade bonds

Gilts, government bonds and mainly corporate bonds with a high rating – anything from AAA down to BBB – are deemed to be 'investment-grade', lower-risk bonds. On the corporate side, these ratings are usually given to financially robust institutions, such as utility companies and supermarkets.

High-yield bonds

'High-yield' bonds, sometimes known as 'junk bonds', are issued by companies deemed to be at greater risk of being unable to pay back their debt ('defaulting'). In order to attract investors to take on added risk, they offer much higher rates of interest. These companies will carry a rating of BB or lower.

Gilt, government bond and corporate bond credit ratings

This table shows the Standard and Poor's ratings on gilts, government bond and corporate bonds, along with what they can tell you about the health of a particular company or government bond.

Fixed interest credit ratings explained
Rating Grade Riskiness
AAA Investment Grade Highest quality - lowest likelihood of default
AA Investment Grade High quality - very low likelihood of default
A Investment Grade Strong - low likelihood of default
BBB Investment Grade Medium grade - medium likelihood of default
BB, B High Yield Speculative - high risk of default
CCC, CC, C High Yield Highly speculative - high risk of default
D High Yield Default - unable to pay back debt

Getting to grips with the issuer of a bond and its rating is key to understanding how you can make money from bonds. As with all investments, the greater the risk you take, the greater potential return you could make. Inevitably, this also comes with greater potential for loss.

How do I buy gilts and corporate bonds?

There are two main options if you want to buy fixed-interest investments – you can invest directly in individual bonds or you can invest in collective investments such as unit trusts.

Direct investment in gilts and corporate bonds

You can buy gilts directly from the government's Debt Management Office.

You can buy corporate bonds from the London Stock Exchange's Retail Bond Platform. They require a minimum investment of £1,000. Unlike shares, they don't give you a stake in the company, but make you a creditor, ranking above shareholders in the pecking order if the company becomes insolvent.

You may not get your full investment back in this instance – only a proportion of the assets that are left. But while shareholders will lose everything if a company goes bust, bondholders often recoup a significant proportion of their capital.

You're not covered by the Financial Services Compensation Scheme, so it is important to assess the strength of the business you are lending to.

You can also buy gilts and corporate bonds through a stockbroker or fund supermarket.

Find out more: Fund supermarkets reviewed – our unique ratings for leading brokers

Investing in bond funds

Bond funds are collective investments, such as unit trusts or open-ended investment companies (Oeics). These funds pool your money with other investors' and invest it in a broad range of gilts or bonds.

Unlike direct investment, there is no maturity date with bond funds. The manager invests in dozens, or even hundreds or different bonds or gilts.

By investing in multiple bonds within a fund, you are able to spread risk. You can expect to pay an annual charge of between 0.5% and 1% for investing through a corporate bond or gilt fund, or much lower if you choose a corporate bond or gilt-tracker fund.

Find out more: Unit trusts and Oeics – understand how investment funds work

There are two types of gilt funds available to investors:

  • gilt funds, which must have 80% invested in UK gilts
  • index-linked gilt funds, which must have 80% invested in UK index-linked gilts.

There are four types of corporate bond funds available to investors:

  • corporate bond funds, which must have 80% invested in investment-grade corporate bonds
  • global bond funds, which must have 80% invested in overseas investment-grade corporate bonds
  • strategic bond funds, which must have 80% invested in fixed-interest, including convertibles (bonds that can be converted to shares), preference shares and permanent interest-bearing shares
  • high-yield bond funds, which must have 80% invested in high-yield bonds.