Every index-linked annuity has to answer one question: when the market falls, who eats the loss? Fixed indexed annuities (FIAs) and registered index-linked annuities (RILAs) give three different answers — the full floor, the partial floor, and the buffer — and the differences decide both your worst case and how much upside the insurer can afford to give you.
This guide compares the three protection designs side by side. For the full picture of the products around them, see how fixed indexed annuities work and what a RILA is.
The Three Protection Designs at a Glance
| Design | Found in | Who absorbs the first losses | Your worst case on the index | Upside potential |
|---|---|---|---|---|
| 0% floor | FIA | Insurer absorbs all index losses | A 0% credit for the period | Lowest — tightest caps and participation rates |
| Buffer | RILA | Insurer absorbs the first stated portion; you take the rest | Large — a deep crash beyond the buffer is mostly yours | Higher — you carry the tail risk |
| Below-zero floor | RILA | You absorb losses down to the floor; insurer takes the rest | Capped at the floor level | Higher than an FIA, structured differently than a buffer |
The FIA's 0% Floor: Full Protection, Bounded Upside
An FIA never credits a negative return. In a down year you receive 0%, and interest credited in earlier years stays locked in — the annual reset means a later crash can't claw back past gains. In exchange, the insurer bounds your upside tightly with caps, participation rates, or trigger rates; the mechanics are covered in our cap rate guide, with today's declared rates on the live FIA cap rate table.
Two honest caveats. The floor protects against index losses, not against costs: rider and strategy fees deduct in any year, so an account with a 0% credit and a rider fee ends the year down. And the floor doesn't apply if you leave early — surrender charges and any market value adjustment come out of your value regardless of what the index did. See how surrender charges work.
The RILA Buffer: The Insurer Takes the First Hit
A buffer states how much index loss the insurer absorbs before you lose anything. The numbers below are hypothetical, chosen to make the arithmetic clear. With a 10% buffer over a one-year term:
- Index falls 6%: inside the buffer — you lose nothing.
- Index falls 10%: exactly the buffer — you still lose nothing.
- Index falls 25%: the insurer absorbs the first 10 points; your account falls 15%.
A buffer is calibrated to ordinary corrections — the kind of downturn markets produce routinely gets absorbed entirely. What stays with you is the tail: the once-a-decade crash lands mostly on your side of the line, minus the buffer.
The RILA Floor: You Take the First Hit, With a Hard Stop
A RILA floor is the buffer's mirror image. With a hypothetical -10% floor: an index drop of 6% costs you 6%, a drop of 10% costs you 10%, and a drop of 25% still costs you only 10% — the insurer absorbs everything beyond the floor. You feel every routine dip, but you know your worst case in advance, in writing.
Which Risk Do You Actually Fear?
The right choice tracks the loss you can't afford, not the loss that's most likely. A buffer suits someone who expects normal volatility and wants routine downturns erased, and who has the time horizon to recover from a rare deep crash. A floor suits someone for whom a defined worst case is the whole point — often a retiree guarding against sequence-of-returns risk in the first years of withdrawals. The FIA's 0% floor suits someone who won't accept index losses at all and will trade most of the upside for that certainty.
Upside pricing follows the same logic in reverse: the more loss you accept, the more upside the insurer can fund from the same options budget. That's why a RILA typically quotes higher caps than an FIA on the same index and term, and why the deepest buffers come with the tightest RILA caps. Protection isn't free at any point on the curve — it's bought with upside.
You don't have to pick a single point on the curve. Many buyers hold both product types — an FIA for money that must not shrink, a RILA sleeve for money that can ride out a bad year — and RILAs themselves usually offer several buffer or floor levels per index, so allocations can be split within one contract. The design question is portfolio-level, not either-or.
Differences Beyond the Loss Math
- Regulation. A RILA can lose value, so it's an SEC-registered security sold by prospectus through a securities-licensed professional. An FIA is an insurance product under state regulation.
- Mid-term withdrawals. Buffers and floors apply at the end of a crediting term. Money taken mid-term is usually valued by an interim formula that can pass through losses the end-of-term protection would have absorbed.
- Term length. FIA strategies commonly credit annually; RILA segments often run one, three, or six years, and longer terms leave your money exposed to the interim-value problem for longer.
- What's credited. Both product types typically credit index price return — dividends aren't included in either.
How to Decide
- Write down the largest one-year loss you could absorb without changing your plans. That number points to a design: none → FIA floor; routine dips only → RILA floor; anything but a crash → RILA buffer.
- Price what the protection costs in upside. Compare a RILA's quoted caps against the live FIA cap rates for the same index and term, and see current FIA products with carrier ratings on the FIA hub.
- If you don't need index linkage at all, a fixed declared rate may serve better — the tradeoff is laid out in fixed indexed annuity vs fixed annuity.
- Whichever design you choose, vet the carrier's renewal behavior — caps and buffers are re-declared over time, and renewal rates are where indexed contracts are won or lost.
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Live S&P 500 cap rates on fully floored FIAs, ranked from highest to lowest with carrier and AM Best rating for each — the baseline to price any buffer or floor against.