Banksparency Savings Rate Indices
Official Methodology
Rate data as of August 22, 2026
Indices last computed: August 23, 2026 at 11:30 UTC
Methodology last reviewed: August 22, 2026
Our Mission
The U.S. consumer savings landscape is complex and dynamic. The mission of the Banksparency Savings Rate Indices is to bring clarity, transparency, and a set of reliable benchmarks to this market. We aim to provide journalists, consumers, and financial professionals with an accurate, daily measure of the interest rates available to the American public.
Our methodology is designed to be transparent, consistent, and intellectually honest, allowing for a clear understanding of the different segments within the high-yield savings account (HYSA) market.
Summary of the Indices
| Index Name | Represents | Key Differentiator |
|---|---|---|
| Core Savings Index™ | The true, passive HYSA market for the everyday saver. | No account activity required; <$1,000 minimum. |
| Premier Savings Index™ | The passive HYSA market for affluent savers. | No account activity required; $1,001 - $100,000 minimum. |
| Relationship Rate Index™ | The active banking market where high APYs are a reward. | Requires specific account activity (e.g., direct deposits). |
Detailed Index Definitions
1. Core Savings Index™
Tracks 56 accountsPurpose: This is our headline index. It represents the average APY for the true, passive high-yield savings market that is accessible to the vast majority of American savers without requiring a change in their primary banking behavior.
Inclusion Criteria:
- Federally Insured & Nationally Available: All accounts must be federally insured, by the FDIC at banks or by the NCUA at credit unions, and be available to any U.S. resident.
- No Monthly Maintenance Fees: Accounts that charge a monthly fee that cannot be easily waived are excluded.
- Minimum Balance Requirement: $0 to $1,000: The account must require a minimum of $1,000 or less to open and earn the advertised APY.
- No Activity Requirements: The account's advertised APY must be attainable without requiring direct deposits, a set number of debit card transactions, or other recurring account activities.
2. Premier Savings Index™
Tracks 10 accountsPurpose: This index tracks the average APY for the passive HYSA market catering to savers with a higher-than-average cash position.
Inclusion Criteria:
The account must meet all criteria from the Core Savings Index, with one exception:
- Minimum Balance Requirement: $1,001 to $100,000: This range captures the "mass affluent" and "jumbo" tiers of the consumer savings market.
3. Relationship Rate Index™
Tracks 12 accountsPurpose: This index tracks the average APY for accounts that offer high rates as a reward for a deeper, more active banking relationship. These are not passive savings vehicles but part of a cash-flow management system.
Inclusion Criteria:
- Meets the basic criteria of being Federally Insured and Nationally Available.
- Requires Account Activity: The account's highest advertised APY is conditional upon the customer meeting specific activity requirements. This includes, but is not limited to, setting up qualifying direct deposits, executing a minimum number of debit card transactions, maintaining balances in linked accounts, or using a proprietary app.
Note: This index tracks the top-tier, conditional APY. We recognize these rates are often tiered and may only apply up to a specific balance. This is the one index that does not use the base-tier rule described below, because the conditional top rate is the figure it exists to measure.
4. Money Market Index
Tracks 59 accountsPurpose: This index measures the whole personal money market pool we track, not a high-yield subset of it. It is not filtered against the FDIC national average, so it includes both the legacy accounts paying near zero and the high-yield accounts competing with savings. We publish the median beside the mean for that reason: the two are far apart, and neither number on its own describes a typical money market rate.
Inclusion Criteria:
- Personal Money Market Accounts: Business accounts are excluded.
- No Activity Requirements: The headline rate cannot depend on direct deposit, card transactions, a bundle, or a relationship tier.
- Minimum Balance Requirement: $0 to $1,000.
- No National Availability Requirement: Unlike the three savings indices, this index covers the whole consumer-visible market we track, including institutions that serve one region.
5. CD Indices, by Term
10 terms publishedPurpose: One index per term length, because a single average across every term answers no question a saver actually has. A 3-month CD and a 5-year CD are different products priced off different parts of the curve.
Inclusion Criteria:
- Personal Fixed-Rate CDs: Business and variable-rate certificates are excluded, and each CD is assigned to exactly one term.
- No Minimum Balance, Activity, or National Availability Filter: These indices cover the whole consumer-visible market we track, the same population as the tables on our CD pages.
- A 25-Product Publication Floor: A term is published only when at least 25 products hold it. Below that the index is not thin, it is absent: we publish no figure rather than a figure a handful of banks could move.
| Term | Mean APY | Median APY | Products |
|---|---|---|---|
| 3 months | 2.34% | 3.00% | 78 |
| 6 months | 2.73% | 3.28% | 117 |
| 9 months | 3.12% | 3.55% | 48 |
| 12 months | 2.83% | 3.28% | 125 |
| 18 months | 2.71% | 3.14% | 93 |
| 24 months | 2.74% | 3.00% | 117 |
| 30 months | 1.98% | 2.25% | 48 |
| 36 months | 2.56% | 2.75% | 110 |
| 48 months | 2.41% | 2.55% | 95 |
| 60 months | 2.50% | 2.62% | 103 |
How We Pick One APY Per Account
Most accounts advertise more than one rate. Each index takes one figure per account, called the base tier: the highest standard or capped rate that is available on a balance of at least $1,000, or on any balance where the account sets no upper limit.
Promotional and bonus tiers are excluded. So is a headline rate that applies only to a small opening balance, such as 5% on the first $500. One consequence is worth stating plainly: an account can show a higher rate in our rate tables than it contributes to an index, because the tables show what the bank advertises and the index shows what a saver with a normal balance actually earns.
The Relationship Rate Index is the exception. It takes the highest tier of any kind, because a conditional top rate is exactly what that index measures.
Scope & Data Integrity
- Data Source: All rates are sourced directly from publicly available information on the financial institutions' websites.
- Update Frequency: Every index is recomputed each day at 11:30 UTC, and a mid-day publication can recompute it again. The "indices last computed" date at the top of this page is that timestamp, and it is separate from the rate data date beside it: the indices rebuild on schedule whether or not any bank moved a rate.
- What the Savings Indices Exclude: The three savings indices track liquid savings accounts only. Brokerage sweep accounts, money market funds, and accounts with minimum balance requirements over $100,000 are not included. Certificates of deposit and money market accounts have their own indices, above.
- A Moving Threshold: "High-yield" is not a fixed number. The three savings indices admit an account only when its APY is above the FDIC national average savings rate, and that test is re-applied on every refresh. So the constituent counts on this page move with the market, and a falling market shrinks the indices rather than dragging their averages down.
- National Availability: This requirement applies to the three savings indices only. An account qualifies through a stated nationwide offering, or through an availability list covering 45 or more states. The money market and CD indices carry no such test and cover the whole consumer-visible market we track.
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