Annuity guide
Fixed index annuities
A fixed index annuity credits interest based on the movement of a market index, with a floor so a losing year credits zero instead of a loss, and a ceiling so a strong year credits far less than the index gained. You are not invested in the market — you own a contract whose interest formula references it. That distinction explains nearly everything else about the product.
Last updated September 19, 2026 · Reviewed against our editorial methodology
What a fixed index annuity is
A fixed index annuity — also sold as an indexed annuity or equity-indexed annuity — is a deferred fixed annuity whose interest rate is not declared in advance. Instead the insurer calculates interest from the change in an index such as the S&P 500 over a crediting period, applies limits written into the contract, and credits the result.
Two features define it. The floor, almost always 0%, means the account value never falls because of index performance. The ceiling — a cap, participation rate, or spread — means you keep only part of a good year, and you never receive index dividends. It is an insurance product, not a security, so it is sold without a prospectus and regulated by state insurance departments.
How the crediting formula works
The insurer takes your premium and invests the bulk of it in bonds, much as it would for a plain fixed annuity. Part of the expected bond yield is spent on call options on the chosen index. If the index rises, the options pay and fund your credited interest. If it falls, the options expire worthless and the bond portfolio still protects your principal — so you get 0%.
This is why caps move with interest rates. When bond yields are high the insurer has a larger option budget and can offer a higher cap; when yields fall, caps fall with them. It also explains why the insurer can reset the cap annually: the option budget changes every year.
Caps, participation rates and spreads
| Lever | What it does | Example on a 12% index year |
|---|---|---|
| Cap | Sets the maximum credited rate | 9% cap → 9% credited |
| Participation rate | Credits a percentage of the index move | 60% participation → 7.2% credited |
| Spread / margin | Subtracts a fixed amount from the index move | 3% spread → 9% credited |
| Floor | Sets the minimum credited rate | 0% floor → never negative |
Contracts often combine them — a participation rate and a spread, for instance — which is where comparison gets difficult. Ask for the guaranteed minimum version of each lever, not just the current one, because the current figures can be reset.
Crediting methods and index choices
- Annual point-to-point. Compares the index on two dates a year apart. Simple and the easiest to verify.
- Monthly sum / monthly point-to-point. Adds capped monthly gains and uncapped monthly losses. Looks attractive in illustrations and tends to credit poorly in volatile years.
- Monthly averaging. Averages index values across the year, which smooths results and usually lowers them in a rising market.
- Multi-year point-to-point. Measures over two or more years, sometimes with a higher cap but no credit at all in between.
Many newer contracts also offer proprietary or volatility-controlled indices built by a bank for annuity use. They often come with a high or uncapped participation rate, which sounds generous — but the index itself targets low volatility, so its raw returns are structurally modest and there is no long live track record. Treat a large participation rate on a short-lived custom index with scepticism.
A worked example
$100,000 in a contract with annual point-to-point crediting, a 9% cap and a 0% floor, over four hypothetical index years of +18%, −8%, +6% and +11%:
| Year | Index | Credited | Account value |
|---|---|---|---|
| 1 | +18% | 9% (capped) | $109,000 |
| 2 | −8% | 0% (floor) | $109,000 |
| 3 | +6% | 6% | $115,540 |
| 4 | +11% | 9% (capped) | $125,939 |
That is about 5.9% a year — clearly better than cash and immune to the down year. An index investor over the same path, with dividends, would have finished ahead, and would also have lived through the loss. That trade is the honest case for the product.
What it really costs
A base fixed index annuity usually has no explicit annual fee. The cost is embedded: you forgo dividends and the portion of index gains above the cap. Explicit charges appear when you add features:
- Income or guaranteed lifetime withdrawal riders: commonly 0.75%–1.5% a year.
- Enhanced death benefit riders: often 0.3%–0.75% a year.
- Bonus-crediting index options: usually paid for with a lower cap or a longer surrender.
- Surrender charges: typically 7–10 years, starting near 8%–10%, plus a market value adjustment.
- Agent commission: paid by the insurer, often 4%–7%, which is why these are heavily marketed.
Income riders
Most index annuities are sold with a guaranteed lifetime withdrawal benefit. The rider tracks a separate benefit base that can grow at an attractive roll-up rate, and lets you withdraw a set percentage of it for life. Two things to keep straight:
- The benefit base is not cash. You generally cannot withdraw or leave it to heirs — it exists only to calculate income.
- A 7% roll-up on the benefit base is not a 7% return. Compare the resulting annual income in dollars against an immediate annuity quote for the same premium and start date. That is the only comparison that means anything.
How it compares
| Fixed | Fixed index | Variable | |
|---|---|---|---|
| Market loss possible | No | No | Yes |
| Return known in advance | Yes | No | No |
| Explicit annual fees | None | Only with riders | Typically 2%+ all-in |
| Upside potential | Low, certain | Moderate, capped | Highest, uncertain |
| Complexity | Low | High | High |
Who it suits
A fixed index annuity is defensible for a slice of conservative money when you want more than a fixed rate, refuse to accept market losses, and can genuinely leave the money alone for the whole surrender period. It is a poor choice if you need liquidity, if a comparable MYGA rate already meets your goal with far less complexity, or if you cannot explain the crediting formula back to the agent in your own words.
Questions to ask before signing
- What is the current cap or participation rate, and what is the guaranteed minimum?
- How often can the insurer reset it, and what has its reset history looked like?
- Which index and which crediting method — and may I see the formula in the contract?
- What is the full surrender schedule, and does a market value adjustment apply?
- How much can I withdraw each year without penalty?
- If there is an income rider: what is the dollar income at my planned start age, and how does that compare with a SPIA quote today?
- What is the issuer's AM Best rating, and my state guaranty limit?
Frequently asked questions
- What is a fixed index annuity?
- A fixed index annuity is an insurance contract that credits interest using a formula tied to a market index such as the S&P 500. A floor — normally 0% — means a negative index year credits nothing rather than a loss, and a cap, participation rate or spread limits how much of a positive year you keep.
- How does a fixed index annuity work?
- The insurer invests your premium mostly in bonds and uses part of the yield to buy options on the index. In each crediting period it measures index change, applies the contract's cap, participation rate or spread, and credits the result to your account value — never less than the floor.
- What is the downside of a fixed index annuity?
- You give up dividends and a large part of strong market years, the insurer can usually reset caps and participation rates each year within contractual limits, surrender charges often run seven to ten years, and illustrations of past index performance rarely reflect what the formula would actually have credited.
- What is a typical fixed index annuity return?
- Over full market cycles, realistic long-run credited returns have generally landed in the low-to-mid single digits — better than cash, usually behind a diversified stock and bond portfolio, and well behind the index itself. Any pitch implying near-index returns with no downside is misdescribing the product.
- Can you lose money in a fixed index annuity?
- Not from index declines, because of the floor. You can lose money by surrendering early and paying a surrender charge and market value adjustment, and rider fees deducted in a flat market can reduce your account value.
- Is a fixed index annuity a good investment for a 70-year-old?
- It can be reasonable for a portion of safe money if the surrender period ends within the time you will not need the funds, and if the goal is protected growth or contractual income. It is a poor fit if a ten-year surrender schedule extends past your realistic access horizon — a shorter fixed annuity or an immediate annuity is often the cleaner answer.
Sources
- FINRA — Equity-indexed annuities investor alert.
- U.S. Securities and Exchange Commission, Investor.gov — Indexed annuities.
- National Association of Insurance Commissioners — Annuity Disclosure Model Regulation; Best Interest Standard.
- Internal Revenue Service — Publication 575, Pension and Annuity Income.
- Insurer product brochures, rate sheets and statements of understanding, checked at the date shown above.
