Corporate Bonds vs Government Bonds: Risk, Yield and Credit Spread

Both are called bonds, but they answer two different questions. A government bond asks, "How do I lend to the safest borrower around and get paid for time and inflation?" A corporate bond asks, "How much extra will I earn for lending to a company that could, in theory, fail to pay me back?" That gap in the question is the whole story of corporate bonds vs government bonds.

Here is the core takeaway up front: government bonds (US Treasuries, UK gilts) carry almost no default risk, so they act as portfolio ballast; corporate bonds pay a higher yield because you are taking on credit risk, and that extra yield is measurable to the basis point. This guide shows you how to read that premium, what the default data says, and when to hold each. If you want the full toolkit behind income investing, our structured ETF and index investing course is a practical place to start.

Corporate bonds vs government bonds: the short answer

Buy a government bond and you lend to a sovereign that prints its own currency, so getting your money back is close to certain — your real enemies are rising interest rates and inflation. Buy a corporate bond and you lend to a company, which can and sometimes does default, so you demand a higher yield to compensate.

Everything else — the pricing, the ratings, the portfolio role — flows from that single difference. The table below puts the two side by side on the dimensions that actually drive a decision.

Source: US Federal Reserve (FRED, DGS10) and ICE BofA US Corporate & High Yield indices via FRED, 2026; S&P Global Ratings 2024 default study.

What's the real difference? Credit risk vs interest-rate risk

The real difference is the kind of risk you are paid for. Government bonds compensate you for lending over time and for inflation eroding your money; their issuer will not run out of its own currency. Corporate bonds compensate you for all of that plus the chance the company misses a payment or defaults. That added credit risk is why they yield more.

Both bond types still share interest-rate risk: when market rates rise, the price of any existing fixed-rate bond falls, government or corporate alike. That is why even "safe" government bonds can lose value in a year — the capital loss comes from rates moving, not from the borrower failing. If rate sensitivity is your concern, how you hold the bonds matters as much as which you pick, something we unpack in our guide to choosing between a bond ladder and a bond fund.

So the mental model is simple. Government bond: time plus inflation. Corporate bond: time plus inflation plus credit. Price the third piece correctly and you understand the entire asset class.

Why do corporate bonds pay more? The credit spread in numbers

The extra yield a corporate bond pays over a government bond of similar maturity is the credit spread. It is quoted in basis points (one basis point = 0.01%) and it is the single most important number in corporate-bond investing, because it is the market's live price for default risk.

As of 8 October 2026, the option-adjusted spread on the ICE BofA US investment-grade corporate index was 0.82% over Treasuries, while the US high-yield index sat at 3.15%. In plain terms: lend to a solid investment-grade company and you earn roughly 0.8% a year more than a Treasury; drop down to high-yield ("junk") and the market pays you about 3.2% more — because the odds of not being repaid are far higher.

Put that in dollars. Invest $10,000 in an investment-grade corporate bond yielding 0.82% more than Treasuries and you earn roughly $82 a year of extra income; shift the same $10,000 into high-yield at +3.15% and you earn about $315 more. The catch: a single default in a high-yield holding can erase several years of that extra income at once, which is why the premium exists and why diversification across many issuers matters so much in the high-yield space.

What this means for you: treat the spread as a risk thermometer, not free money. When spreads are narrow — and in late 2025 investment-grade spreads were near their tightest since 1998 (LPL Research, 2025) — you are being paid very little to take credit risk, so the case for reaching into lower-quality bonds weakens. When spreads blow out in a crisis, corporate bonds get cheaper and the extra yield gets fatter, but that is precisely when default risk is rising too. The spread does not just sit still: it narrows when the economy looks healthy and investors are relaxed, and widens sharply when recession fears rise and buyers demand a bigger cushion for the risk of default.

Are corporate bonds riskier than government bonds?

Yes — but "corporate bonds" is not one risk level, it is a spectrum. A top-rated investment-grade bond behaves almost like a government bond; a low-rated high-yield bond behaves far more like equity. The ratings scale (AAA down to CCC and below) is the map, and the default data shows exactly how steeply risk climbs as you go down it.

The long-run numbers are stark. Investment-grade bonds have defaulted at roughly 0.1% a year over the long run (Schroders, 2025), and even in the depths of the 2008 financial crisis the investment-grade default rate stayed below 1% (Moody's data, 2025). High-yield is a different animal: S&P Global Ratings put the global speculative-grade default rate at 3.9% in 2024, and 91.7% of that year's defaulters were rated CCC+ or lower before they failed.

Source: Schroders, 2025 (IG long-run); S&P Global Ratings, 2024 Annual Global Corporate Default and Rating Transition Study, 2025 (speculative-grade).

What this means for you: the 3.15% of extra yield on high-yield is not a gift — in a bad year a chunk of it, and sometimes more, is eaten by defaults. Investment-grade corporates, by contrast, hand you a modest premium with historically tiny default losses, which is why they sit much closer to government bonds on the risk map.

Investment-grade vs high-yield: two different decisions

Lumping all corporate bonds together is the most common beginner mistake. The ratings line between investment-grade (BBB-/Baa3 and above) and high-yield (below that) splits the asset class into two genuinely different decisions.

Investment-grade corporates

These are bonds from financially strong companies rated BBB-/Baa3 or higher by the major agencies — think large banks, established industrials and blue-chip utilities. They yield a little more than government bonds, default very rarely, and tend to wobble only modestly in a downturn. For most investors building a core bond allocation, this is the sensible corporate exposure — a small, reliable step up in yield without taking on equity-like risk.

High-yield corporates

These come from weaker or more leveraged companies. The yields look tempting, but prices can fall hard in a recession and defaults cluster exactly when the economy sours and your stocks are already down. High-yield behaves less like a bond and more like a cousin of equity, so it rarely provides the "safe ballast" people expect from fixed income.

What role should each play in your portfolio?

Think in terms of jobs, not labels. Government bonds do the defensive job: they are the asset most likely to rise, or at least hold steady, when stocks are falling, which is what makes a 60/40-style portfolio shock-absorbing. That is their entire reason for being there — not maximum yield, but reliability under stress.

Corporate bonds do the income job: they lift the overall yield of your bond sleeve in return for accepting some credit risk. Investment-grade does this gently; high-yield does it aggressively and with far more correlation to equities. Here is the catch many investors miss: high-yield tends to fall at the same time as stocks, so it offers the least protection exactly when you most want your bonds to cushion a portfolio. Many diversified investors therefore hold government bonds for defense and investment-grade corporates for a yield top-up, keeping high-yield as a small, deliberate position if they use it at all. Where these bonds sit also has tax consequences — for UK investors, for instance, the treatment of gilts differs from other holdings, as we cover in our explainer on how UK government bonds are taxed.

Which should you choose?

There is rarely a pure either/or answer; the better question is the mix. Use these starting points, then adjust for your own goals and risk tolerance:

• You want maximum safety and a shock absorber: weight toward government bonds (Treasuries/gilts). Accept the lower yield as the price of reliability.
• You want a bit more income without much extra risk: add investment-grade corporates. The roughly 0.8% spread is a reasonable trade for historically sub-1% default risk.
• You are chasing the high-yield premium: size it small and go in with eyes open — the 3.15% spread comes with a 3.9% default backdrop and equity-like drawdowns.
• You are building a simple, diversified core: a broad bond fund blending government and investment-grade corporates covers most needs, and slots neatly into a wider plan like a three-fund portfolio.

Whatever the mix, decide it from the spread and the default data, not from the headline yield. A high number on a high-yield bond is high for a reason.

Frequently asked questions

Investing involves risk: bond prices fall when interest rates rise, and corporate bonds can default, so your capital is at risk. This article is educational content, not investment advice.