A Guide to Fixed Index Annuity Crediting Methods

Published October 28, 2020 · Updated October 20, 2025
Fixed Index Annuity

Index Annuity Crediting Methods Explained

An index annuity is a type of fixed annuity offering principal protection and the ability to earn interest based in part on the performance of an external market index. The amount of interest your annuity earns is determined by index annuity crediting methods and crediting components. In this guide, I will go over the types of crediting methods and components and how each of them works.

The three types of index annuity crediting methods are:

Each of these index annuity crediting methods also has one, or multiple, limiting components that determine how much interest is ultimately credited to your fixed index annuity.

Index Annuity Crediting Components 

Before we cover the available index annuity crediting methods we should explain the different types of crediting components. Crediting components will affect how your indexed interest is calculated. These crediting components include:

  • Cap
  • Participation Rate
  • Spread

 

Cap

Some fixed index annuities set a maximum rate of interest (or cap) that the contract can earn in a specified period (usually a month or year). If the chosen index increase exceeds the cap, the cap is used to calculate your interest.

For example, if the annual cap in a hypothetical example were 3.00% and the value of the index rose by 4.80%, the cap amount of 3.00% would be credited to your contract. However. if the index change was 2%, your contract would be credited 2% since that is lower than our hypothetical cap.

Index PerformanceCapInterest Earned
8%5%5%
5%5%5%
-3%5%0%

Participation Rate

In some annuities, a participation rate determines what percentage of the index increase will be used to calculate your indexed interest.

For example, let’s suppose the index rose by 10%. If a hypothetical FIA had a 75% participation rate, the contract would receive 7.5% in indexed interest.

Index PerformancePAR RateInterest Earned
10%80%8%
5%80%4%
-5%80%0%

Spread

The indexed interest for some annuities is determined by subtracting a percentage from any gain (spread) the index achieves in a specified period.

For example, if the annuity has a 4% spread and the index increases 10%, the contract is credited 6% indexed interest.

Index PerformanceSpreadInterest Earned
10%2%8%
5%2%3%
-5%2%0%

How Do Index Annuities Work?

Annual Point to Point

Annual point-to-point is the simplest and most commonly used indexed annuity crediting method. Annual point-to-point uses the index value from only two points in time so this may be a good choice if you want to minimize the effects of mid-year market volatility.

Annual point to point chart for index annuity crediting method
Annual point-to-point index annuity crediting method
  • The index value from the beginning of the crediting period is subtracted from the value of the index at the end of the crediting period. 
  • The percentage of change is calculated.
  • If the value at the end of the year is higher than the beginning of the year crediting component is applied to determine your interest credited. 

As an example let’s assume an index change of 7% and apply the cap, spread, or participation rate. For this example, we will assume a 5% cap, a 2% spread, and a 75% participation rate.

5% Cap = 5% Interest credited (index change up to the cap)

2% Spread = 5% Interest credited (index change – spread)

75% Participation Rate = 5.25% Interest Credited (index change X spread)

2 Year Point to Point

2-year point-to-point uses the index value from two points in two contract years apart so this index annuity crediting method may be a good choice if you want to limit the effects of volatility between these two points. 

Index annuity crediting methods 2 year point to point chart

The index value from the beginning of the crediting period is subtracted from the value of the index at the end of your second crediting period (two years). The percentage of change is calculated. If the value at the end of the second year is higher than the beginning of period one a crediting component is applied to determine your interest credited. 

Monthly Sum

The monthly sum is the most volatility-sensitive index annuity crediting method. It can provide the most interest in steady up-markets but it can be adversely affected by large monthly decreases. 

Monthly sum index annuity crediting method chart
Monthly Sum Index Annuity Crediting Method
  • On your contract anniversary each month, the index value is compared to the prior month’s value, and the percentage of change is calculated.
  • At the end of the year, the monthly index increases, and decreases are added up. The increases are subject to a cap; however, the decreases are not.
  • If the final sum is positive you’ll receive that amount as interest
  • If the final sum is negative you’ll receive zero percent interest for that contract year.

Index Annuity Crediting Methods in Summary

The index annuity crediting method you select can significantly impact how much interest you earn so you should consider your options carefully. The chart below shows each index annuity crediting method’s sensitivity to volatility and interest potential. 

The monthly sum is the most sensitive to volatility but also has the highest earning potential.

Index annuity crediting methods sensitivity to volatility and upside potential diagram.

Is an Index Annuity Right for you?

The answer is “Maybe”

It ultimately depends on your financial goals and needs. Before purchasing an index annuity you should consider all of the pros and cons. FINRA’s article. “ The Complicated Risks and Rewards of Indexed Annuities” is a good read for anyone considering adding an index annuity to their retirement portfolio. 

Ibbotson whitepaper on fixed indexed annuities download

Download the complete 23 page Ibbotson Whitepaper on Fixed Index Annuities

📊
Get Today's Best MYGA Rates
Compare A-rated carriers. Rates up to 6.50%. No obligation.
Editorial Disclosure: Our editorial team independently reviews and rates annuity products. We may earn commissions when you request a quote through our partner links. This content is for informational purposes only and does not constitute financial advice. Learn more.
Disclaimer: This content is for informational and educational purposes only. It does not constitute financial, tax, or legal advice. Annuity products vary by state and carrier. Always consult a licensed financial professional before making any financial decisions. My Annuity Store is an independent marketplace and does not provide investment advice.

Today's Top MYGA Rates by Term

A-rated carriers only · Updated daily · Source: AnnuityRateWatch

See all rates →

Rates sourced from AnnuityRateWatch. A-rated carriers (AM Best) only. Not a solicitation. Rates vary by state. Verify before purchasing.

Types of Annuities

Find the right annuity product for your retirement goals.

How We Source Annuity Rates

My Annuity Store sources rate data from AnnuityRateWatch, which surveys MYGA and fixed annuity offerings from insurance carriers across all available terms (2–10 years). Rate data is refreshed daily to ensure accuracy.

To identify the best rates, we evaluate carriers on: credited interest rate, AM Best financial strength rating (A- or better only), minimum premium requirement, surrender charge schedule, and free withdrawal provisions. Only A-rated carriers are included in our comparisons.

Rates shown are not an offer or solicitation. Rate availability varies by state. Always verify current rates with a licensed insurance professional before purchasing an annuity product.

📊 Data: AnnuityRateWatch · A-rated carriers only · Updated daily

Carriers We Monitor

My Annuity Store tracks rates from 50+ A-rated carriers. Here are some of the top providers included in our comparisons.

Athene Annuity & Life
MassMutual Ascend
Corebridge Financial
Global Atlantic
New York Life
North American Company
American Equity
Nationwide Life
Protective Life
Pacific Life
Midland National
American National
Nassau Life & Annuity
Gainbridge Life
Oceanview Life
Sentinel Security Life
F&G Annuities & Life
Delaware Life
Reliance Standard Life
EquiTrust Life

All carriers shown are rated A- or better by AM Best. Rates and availability vary by state.

Visit our Annuity Company Directory →

Frequently Asked Questions

A Multi-Year Guaranteed Annuity (MYGA) is a fixed annuity that locks in a guaranteed interest rate for a set period, typically 3 to 10 years. Your principal is protected and interest grows tax-deferred until withdrawal.
Annuities from A-rated carriers are backed by the financial strength of the insurer and covered by state guaranty associations, typically up to $250,000 per contract. My Annuity Store only shows products from carriers rated A- or better by AM Best.
Compare rates from multiple A-rated carriers, match your term to your time horizon, and work with an independent advisor. My Annuity Store compares 50+ carriers to find the best rate — free, with no obligation.

Explore More

Get a Free Annuity Quote

Term:
Thank You for Your
Annuity Quote Request

Need more immediate assistance?

Call 855‑583‑1104 Email Us Schedule a Call
What to expect
  • We verify details and check top carriers.
  • You’ll get a simple side‑by‑side comparison.
  • Questions? We’re happy to help—no pressure.

Tip: Check spam/promotions if you don’t see our email on time.

Need help sooner or have a quick question?

  • Call us at 855‑583‑1104 (Mon–Fri, 8:30 AM–6:00 PM ET)
  • Or reply to our confirmation email—our licensed specialists are ready to assist.
Call Now Email Us Schedule a Call

What happens next

  1. We verify your information and run current rates across top carriers.
  2. You’ll receive a simple comparison with rates, features, and fees.
  3. If you like, we’ll walk through options and answer questions—no pressure.

Tip: Check your spam or promotions folder if you don’t see our email within the time window.