Short answer
A fixed annuity pays a set rate; a fixed indexed one ties interest to an index, both protected.
The NAIC says a fixed annuity earns interest at a rate the insurer sets, with a guaranteed minimum. A fixed indexed annuity earns interest based on changes in a market index, within a cap or participation rate, and also carries a guaranteed minimum so the principal is not exposed to market losses. Choose a fixed annuity for a certain, known return, and a fixed indexed annuity if you want some index-linked upside while keeping principal protected.
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What you actually came to find out
Plain answers first. Sources stay below for checking details.
How does a fixed annuity earn?
A set interest rate the insurer fixes, with a guaranteed minimum.
How does a fixed indexed one earn?
Interest tied to a market index, within a cap or participation rate.
Is principal protected in both?
Yes, both carry a guaranteed minimum.
Which is more predictable?
The fixed annuity, because the rate is set.
Fixed
Set rate
The NAIC says a fixed annuity earns at a rate the insurer sets.
Source trail: NAIC
Fixed indexed
Index-linked
The NAIC says a fixed indexed annuity earns based on changes in an index.
Source trail: NAIC
Limits
Caps apply
A cap or participation rate limits how much index change is credited.
Source trail: NAIC
Protection
Both protected
Both carry a guaranteed minimum, so principal is not exposed to market losses.
Source trail: NAIC
The verdict is certainty versus potential: a set rate you can count on, or index-linked upside with caps. Both keep your principal protected.
Neutral landscape
The shape of the question
The NAIC is the main source because it defines both the fixed and fixed indexed annuity.
Source trail: NAIC
The fixed annuity is the certain option, with a set rate and a guaranteed minimum.
Source trail: NAIC
The fixed indexed annuity links interest to an index within caps, aiming for more upside.
Source trail: NAIC
Both protect principal, so the choice is certainty versus index-linked potential.
Source trail: NAIC
Curator core
What the authorities say
These sources are here for the reader who wants to check the work. The plain-English answer stays above them.
Source 01
NAIC
Buyer’s Guide to Fixed Deferred Annuities
The NAIC consumer Buyer’s Guide explains fixed deferred and fixed indexed annuities, guaranteed minimum interest rates, and the questions to ask.
Source framing
The NAIC says a fixed deferred annuity earns interest at a rate the insurer sets with a guaranteed minimum, and a fixed indexed annuity earns interest based on changes in an index.
Strongest for: how fixed and fixed indexed annuities work and what to ask
Read at NAICPlain-English forks
The forks people face
Most retirement questions hide a few smaller decisions. These are the practical pieces that change the plan.
Do you want a certain return?
Why it matters: A fixed annuity sets the rate up front.
In real life: This fork fits a certainty goal.
What to look at: What to look at: the fixed annuity terms.
Do you want some upside?
Why it matters: A fixed indexed annuity links interest to a market within caps.
In real life: This fork fits a growth-with-protection goal.
What to look at: What to look at: the cap and participation rate.
How do you feel about caps?
Why it matters: Indexed upside is limited by a cap or participation rate.
In real life: This fork shapes the realistic upside.
What to look at: What to look at: the crediting formula.
Common questions
Quick answers
Short, plain answers for the questions people usually have next. The source trail stays available below.
What is the difference between a fixed and fixed indexed annuity?+
The NAIC says a fixed annuity pays a set rate the insurer fixes, while a fixed indexed annuity ties interest to a market index within a cap, both with a guaranteed minimum.
Is my principal protected in a fixed indexed annuity?+
Yes. The NAIC says it carries a guaranteed minimum rate, so the principal is not exposed to market losses.
Which one gives more upside?+
The fixed indexed annuity aims for more upside by linking interest to an index, but a cap or participation rate limits how much is credited.
Which should I choose?+
Choose a fixed annuity for a certain, known return, and a fixed indexed annuity if you want some index-linked upside with principal protected.
How this page is curated
This page uses the NAIC Buyer’s Guide. It is neutral education, not a recommendation to buy any product.
Read the planner methodologyTrust anchor
Sources used on this page
Every source named above is listed here in one place.
NAIC. Buyer’s Guide to Fixed Deferred Annuities
https://content.naic.org/sites/default/files/publication-anb-lp-consumer-annuities-fixed.pdf
Before you act on this
This plan is educational. It is not personalized financial, tax, or insurance advice. Projections illustrate the math, they do not predict the future. Talk to your own licensed financial professional before acting on any of it.