Registered index-linked annuities (RILAs): buffers, caps and risk

A registered index-linked annuity (RILA, sometimes called a buffer annuity) credits returns linked to an index such as the S&P 500, but unlike a fixed indexed annuity it can lose money. The insurer absorbs some losses through a buffer or floor, and in exchange your gains are capped. RILAs are securities registered with the SEC, sit between fixed indexed and variable annuities, and have become a major product: LIMRA reported $79.6 billion of RILA sales in 2025.

How a RILA works

You choose a crediting option, typically for a one-, three-, five- or six-year term, tied to an index. At the end of each term the contract compares the index start and end values, then applies the limits. The SEC describes the product this way: investor returns are based in part on index performance over a set timeframe, subject to limits on potential losses and gains, according to the SEC's July 2024 announcement adopting rules for RILAs.

The two main downside designs differ:

• Buffer. The insurer absorbs the first slice of loss. With a 10% buffer, an index drop of 10% or less costs you nothing; a 25% drop costs you 15%.
• Floor. You absorb losses until a floor, then the insurer covers the rest. With a floor of negative 10%, a 25% drop still costs you only 10%, while a small drop costs you the small drop. A floor protects against deep losses and a buffer against shallow ones. Buffers are more common.

On the upside, a cap limits gains (a 12% cap means a 20% index gain credits 12%), or a participation rate gives you a share of them. Whether dividends are counted is contract-specific; price-return indices typically exclude them.

A hypothetical example

Say you put $100,000 in a six-year term with a 10% buffer and a 40% cumulative cap, measured at the end of the term. Three outcomes:

The third row is the key difference from a fixed indexed annuity: you can lose a large part of your principal. Buffers and caps are examples only; real terms vary by company, term and index, and change when you renew.

What to know about the fine print

• Protection applies only at the end of the term. If you withdraw or surrender early, many contracts apply an interim value calculation that can be well below the buffered value, and the buffer may not apply. This is a common misunderstanding. Ask for the interim-value formula.
• Surrender charges. Typically a schedule of several years; see annuity surrender charges and free withdrawals.
• Caps change. Insurers set caps for new terms at renewal.
• Fees. Most RILAs have no explicit annual fee in the base contract, but some charge for riders or for certain options, and you pay through capped upside. annuity fees, explained covers the full list.
• Taxes. Tax-deferred growth, taxed as ordinary income when withdrawn, with a possible 10% additional tax before age 59 1/2 (IRS Topic 410).

Securities rules

Because you can lose principal, RILAs are securities. The SEC adopted rules in July 2024 requiring issuers to register on Form N-4, the form used for most variable annuities, with tailored disclosure and a summary prospectus option; the compliance date for most amendments was May 1, 2026, per the SEC press release. Sellers must be FINRA-registered, with best-interest and suitability obligations; see best interest rules for annuity sales. The SEC's Updated Investor Bulletin: Indexed Annuities also covers the registered type. Read the prospectus and the key-information summary.

Safety

The insurer's claims-paying ability stands behind the contract, with state guaranty association coverage up to limits. According to NOLHGA (as of June 1, 2025), most states cover $250,000 of annuity present value. It does not cover market losses outside the contract's protection. Check yours at the state guaranty association coverage lookup.

RILA vs the alternatives

Who it suits, and who it doesn't

Often suits:

• Investors who want more growth than a fixed indexed annuity can offer and accept some loss risk.
• People with a long horizon who will leave money untouched through the full term.
• Those who understand buffers and the interim-value formula.

Often does not suit:

• Anyone who cannot afford a large loss or who may need to withdraw before term ends.
• Savers expecting a guarantee against loss: deep declines are only partially protected.
• Investors comfortable with low-cost index funds, which have no caps or surrender charges.

Before you buy

1. Ask for the buffer or floor, the cap or participation rate, and the term for each option, and how long those rates are locked.
2. Ask for a written example of what you would receive if you withdrew in year two of a six-year term.
3. Confirm whether the index is price return or total return, and whether it is a standard index or a proprietary one.
4. Find the surrender schedule and the free-withdrawal amount.
5. Ask what happens at the end of the term if you do nothing.
6. Compare the result with what a simple index fund held for the same period would have to earn to match it.

Key takeaways

• A RILA offers capped index-linked returns with a buffer or floor, but you can lose principal.
• Protection typically applies at the end of the term; early exits can mean a much lower interim value.
• RILAs are securities: read the prospectus, and expect a FINRA-registered seller.
• They sit between fixed indexed and variable annuities in risk, upside and cost.
• Backed by the insurer, with state guaranty limits behind it, not against market loss.