Your premium is held by an insurance carrier — not invested directly in the stock market. Interest is credited annually based on the performance of a chosen index. In positive years, interest is credited up to a cap rate or participation rate. In negative years, the 0% floor applies — you earn zero but lose nothing. This is the core protection that makes FIAs fundamentally different from variable annuities or direct market investments.
Index-linked growth
Interest credited based on S&P 500 or other index performance — up to the cap or participation rate set by the carrier.
0% floor guarantee
In any year the index declines, you earn 0% — not a negative return. Your principal and previously credited interest are protected.
Tax-deferred growth
No annual taxes on credited interest. Growth compounds tax-deferred inside the annuity until withdrawals begin — similar to a traditional IRA.
How carriers limit upside — three methods
Cap rate: The maximum interest that can be credited in a given year. If the S&P 500 gains 18% and your cap is 10%, you earn 10%. If the index gains 6%, you earn 6%. Caps vary by carrier and product — typically 8%–14% for standard FIAs, higher for some indexed strategies.
Participation rate: A percentage of the index gain is credited. A 60% participation rate on a 20% index gain = 12% credited. Participation rates typically range from 40%–100% depending on the strategy.
Spread: The carrier deducts a spread from the index gain before crediting. A 2% spread on a 10% gain = 8% credited. Less common than cap or participation rate structures.
| Factor | FIA | CD (bank) | Bond fund (taxable) | Variable annuity |
|---|---|---|---|---|
| Principal protection | ✓ 0% floor | ✓ FDIC | Market risk | Riders only |
| Tax-deferred growth | ✓ Yes | No — annual 1099 | No — annual 1099 | ✓ Yes |
| Market upside participation | Capped/partial | None | Full (with loss risk) | Full sub-accounts |
| Tax on withdrawal | Ordinary income on gains | Ordinary income | Cap gains/ordinary | Ordinary income |
| Guaranteed lifetime income | ✓ Rider available | No | No | ✓ Rider available |
| Annual fees | Low (rider fee only) | None | Fund expense ratio | High (M&E + riders) |
Roth IRA + FIA = tax-free growth with a 0% floor
Placing a Fixed Indexed Annuity inside a Roth IRA combines two powerful features: the Roth's tax-free withdrawal status and the FIA's principal protection and guaranteed income. All growth is tax-free, all qualified withdrawals are tax-free, there are no RMDs on the Roth, and the 0% floor means the account cannot go backwards in negative market years. This is one of the strongest structural combinations in retirement tax planning.
How the income rider works
Most FIAs offer an optional GLWB (Guaranteed Lifetime Withdrawal Benefit) rider for a small annual fee — typically 0.5%–1.0% of the benefit base. The rider guarantees a minimum withdrawal amount each year for life, regardless of account value. Even if the account value drops to zero due to withdrawals, the guaranteed income continues. The benefit base often grows at a guaranteed rate (e.g., 6%–8% per year) during the accumulation phase — creating a floor on your future income that is independent of market performance.
Honest framing — what FIAs are not
FIAs are not directly invested in the market — they are insurance products that credit interest based on index performance. They are not securities and are not regulated by FINRA or the SEC. Upside is limited by caps or participation rates. Surrender charges typically apply for 7–10 years. Free withdrawal provisions (typically 10% per year) allow access without penalty during the surrender period. These are features and constraints to understand fully before purchasing.