INCOME Structured Notes Try the calculator →

Explainer

What is an income structured note?

An income structured note is a debt security issued by a bank. It pays a scheduled coupon and ties the return of your principal to how a market index performs. Both halves are conditional, and that is the whole idea. The common form is auto-callable, which means the note can also end early on its own. This page explains each condition in plain language, with the numbers worked through.

Published 22 August 2026.

The short version. You lend money to a bank for a fixed term. In return the bank pays you a coupon on set dates, but only when a chosen index is at or above an agreed level on each of those dates. At the end of the term you get all your money back if the index finished above that level, and less than all of it if the index finished far enough below. Most of these notes can also end early, at full principal, on a date the index is up — that is the auto-call. Higher coupons come from accepting harder conditions, not from a better deal.

1. What you actually own

You own an IOU from a bank. A structured note is unsecured debt of the issuer, in the same way a corporate bond is, and it sits behind no collateral. The bank promises to pay you according to a formula written on a document called the term sheet.

The index itself is only a measuring stick. You do not own it, you receive no dividends from it, and you do not benefit if it rises far. The index is read on set dates, and the reading decides what the bank owes you.

Notes are built to be held to a fixed maturity date, most often one to five years. The calculator on this site models terms of one to three years.

2. How the income is earned

The coupon on an income note is contingent. Contingent means conditional: the payment is earned rather than promised. On each payment date, the bank looks at where the index closed. If it closed at or above the agreed level, the coupon is paid in full. If it closed below, that payment is skipped.

Observation dates

The dates the bank looks at are called observation dates, and they line up with the payment schedule — most commonly monthly, quarterly, or annually. Only the closing level on that one day counts. Where the index travelled in between changes nothing.

A skipped coupon does not come back

On a plain income note, a payment missed on one date is gone. It is not deferred and it is not made up later, unless the term sheet says otherwise through a feature called memory. Read that word carefully on any term sheet, because it changes the arithmetic.

This is why a headline rate is a maximum rather than a yield. A note quoted at 12% a year pays the full 12% only if every observation date qualifies. Miss a third of them and you collected 8%.

3. What decides whether your principal comes back

Loss protection is how far the index can fall before your capital is touched. It is written as a percentage of the starting level. With 30% protection, the index has to finish more than 30% down before you lose anything at all.

One level often does both jobs: it decides whether each coupon is paid, and it decides whether your principal comes back in full. That is how the calculator on this site models it — one line, two consequences.

They are separate settings, though, and a term sheet can put them in different places. A note might pay its coupon only above 70% of the starting level while protecting principal down to 60%. Read the two levels off the term sheet rather than assuming they are the same number.

A market that falls 40%, against 30% protection.

The first 30 percentage points of the fall are absorbed. Only the 10 points beyond it reach you. You lose 10% of your principal, not 40%. On $100,000 invested, $90,000 comes back.

Buffer or barrier

Two structures share the phrase "loss protection" and behave nothing alike.

  • A buffer, sometimes called hard protection, absorbs the first slice of a decline. The example above is a buffer: a 40% fall costs 10%.
  • A barrier, sometimes called soft protection, is all or nothing. Breach it and the protection disappears rather than shrinking, so the same 40% fall costs the full 40%.

The calculator on this site models a buffer. Which one a real note uses is stated on its term sheet, whatever it calls the two, and it is the single most expensive detail to misread.

4. Why "worst of three" changes the odds

Many income notes are linked to three indices rather than one. The payoff then follows whichever of the three performs worst — not the average of them, and not the best.

If two indices rise 20% and the third falls 35%, the note is measured against the one that fell 35%. Every index has to stay above the protection level for the coupon to be paid. One dragging index is enough to stop the income and to cut the principal.

Worst-of notes quote higher coupons than single-index notes for exactly this reason. The extra income is payment for concentrated risk, not a discount someone found.

5. When the note ends early: the autocall

Most income notes sold today are auto-callable. On scheduled dates the issuer checks the index against a call level, usually the starting level. If the index is at or above it, the note redeems there and then: you get your full principal back, plus the coupon for that date, and the note is over.

Nothing is lost when this happens. It is the good outcome. But it is worth understanding what it does to the income, because the effect surprises people.

  • It caps the total income. A three-year note quoted at 12% that calls after six months paid you 6%, not 36%. The headline rate describes the pace of the coupons, not a total.
  • It hands your money back at the worst time. Notes call when markets are up. That is exactly when the next note on offer pays a lower coupon for the same risk. Having to find a new home for the cash on the issuer's timetable, not yours, is called reinvestment risk.
  • You cannot stop it. The call belongs to the terms, not to either party's choice. There is no option to stay in.

The call level and the protection level are separate numbers and usually sit far apart. A note can be nowhere near calling and still be paying every coupon.

What the calculator does with this. It models the note held all the way to maturity, with no early call. That shows the full coupon schedule and the whole protection story, which is what the mechanics are easiest to see against. A real auto-callable note often ends sooner and pays less in total than the figures on screen. Read them as the full-term case, not as a forecast.

6. What happens at maturity

On the final observation date the closing level of the worst-performing index settles the principal. There are two outcomes and no middle path.

  • At or above the protection level. You receive 100% of your principal, however bumpy the years in between were.
  • Below it. You lose the part of the decline that exceeds the protection, under a buffer, or the whole decline, under a barrier.

Finishing exactly at the level counts as protected. The test is "at or above", so the line itself is on your side.

This is the outcome for a note that runs its full term. An auto-callable note that was called earlier never reaches this test — it ended at full principal on the call date.

7. Where the risk sits

There are four risks, and they are separate from one another.

  • Market risk. The index finishes past your protection and principal falls with it. Protection reduces a loss. It does not cap one.
  • Income risk. Coupons are skipped on any date the index closes below the level, so the income is uneven and can stop entirely.
  • Credit risk. The note is unsecured debt of the issuing bank. If that bank fails, you can lose your money no matter how well the index performed.
  • Liquidity risk. Notes are built to be held to maturity. Any secondary market is usually the issuer alone, at a price the issuer sets.

Yes, a total loss is possible, through the first route or the third. A deep enough fall takes the principal with it, and a failed issuer takes it regardless.

8. What an income note is not

Not a bond

A bond repays its face value at maturity whatever markets did, and pays its coupon on schedule. A structured note ties both the coupon and the principal to a market. Income can be skipped and principal can shrink. Both carry the credit risk of the issuer.

Not FDIC insured

Structured notes carry no FDIC or government insurance. A market-linked CD is a different product that may carry FDIC coverage. A structured note is not one, even when a bank sells both.

Not a fixed yield

The quoted rate is the most a note can pay, not what it will pay. Comparing it with a bond yield or a savings rate compares a ceiling against a floor.

9. Tax

Treatment depends on the specific structure and on your own circumstances, and it is not uniform across note types. Coupons are commonly treated as ordinary income, but the details vary by note and jurisdiction. Confirm the treatment with a tax advisor before investing.

10. See the mechanics move

Reading about a skipped coupon and watching one disappear are different experiences. The calculator lets you set the investment, the term, the coupon rate, and the loss protection, then shows the coupons paid, the coupons skipped, and the principal returned along a simulated worst-of-three path. It runs in your browser and nothing you type is sent anywhere.

Model an income structured note →

More short answers are collected in the frequently asked questions, including autocalls, selling before maturity, and how the figures on the chart are produced.