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Cap Rate

The maximum interest you can earn in a Fixed Index Annuity

๐Ÿ“˜ Glossary โฑ๏ธ 4 min read ๐Ÿ—“๏ธ Last updated: January 2026

Quick Definition: A cap rate is the maximum interest rate credited to a Fixed Index Annuity in a given period, regardless of how much the underlying index gains. If the S&P 500 gains 15% and your FIA has an 11% cap, you receive 11%.

How Cap Rates Work

Cap rates are the ceiling on your potential gains in a Fixed Index Annuity. They exist because insurance companies need to fund the 0% floor protectionโ€”the guarantee that you can't lose money even if the market crashes.

Here's the trade: you give up unlimited upside (like you'd get in stocks) in exchange for downside protection. The insurance company uses options strategies to deliver this combination, and cap rates are how they limit their risk exposure.

๐Ÿ“Š Real Example: Cap Rate in Action

Scenario: Sarah has a $200,000 FIA with an 11% annual cap rate.

Year 1: S&P 500 gains 15%
โ†’ Sarah's credited interest: 11% (capped) = $22,000 gain

Year 2: S&P 500 gains 8%
โ†’ Sarah's credited interest: 8% (below cap) = $17,760 gain

Year 3: S&P 500 loses 12%
โ†’ Sarah's credited interest: 0% (floor protection) = $0 loss

Result: Sarah captured most upside in good years, avoided losses in bad year.

Current Cap Rates (2026)

Cap rates vary by carrier, term length, and market conditions:

Higher cap rates typically mean longer surrender periods or fewer other features. There's always a trade-off.

Cap Rates vs. Participation Rates

Feature Cap Rate Participation Rate
What it is Maximum % you can earn % of index gains you receive
Example 11% cap on S&P 500 125% of index gain
Typical range 8-12% 40-150%
Works together? Participation rate applies first, then cap. Example: Index gains 10% ร— 125% participation = 12.5%, but 11% cap means you get 11%.

Can Cap Rates Change?

Yes, in most cases. Insurance companies typically reserve the right to adjust cap rates annually. This is important to understand:

โš ๏ธ Important: When comparing FIAs, ask whether the cap rate is guaranteed or can be adjusted. A 12% current cap that drops to 8% next year is worse than a guaranteed 10% cap for 10 years.

Higher Isn't Always Better

A higher cap rate sounds great, but consider what you're giving up:

What to Watch For

Red Flags:

The Bottom Line

Cap rates are one part of the FIA equation. A 10.5% cap with a strong participation rate, good crediting method, and flexible features beats a 12% cap with unfavorable terms.

Focus on the total package, not just the headline cap rate.