# Savings rate (Sky Savings Rate)

Working definition: a variable return a stablecoin protocol pays on deposits; Sky's is funded from protocol surplus.

Canonical: https://achivx.org/glossary/savings-rate/
Updated: 2026-11-01

A savings rate (working definition) is a variable return a stablecoin protocol pays on deposits of its stablecoin. Sky says the Sky Savings Rate is a variable protocol rate funded from aggregate Sky protocol surplus that can change over time, and sUSDS is the token that implements it for USDS under the ERC-4626 vault standard. Sky.money says it does not control, set or guarantee the rate.

## What the sources say

| Source | Quote | Link |
|---|---|---|
| Sky.money: what the Sky Savings Rate is | "The Sky Savings Rate is a variable protocol rate funded from aggregate Sky protocol surplus, and it can change over time." | [sky.money](https://sky.money/) |
| Sky.money: not set by Sky.money | "Sky.money does not control, set, or guarantee the rate." | [sky.money](https://sky.money/) |
| Sky developer docs: sUSDS implements the rate | "sUSDS token represents a tokenized implementation of the Sky Savings Rate for USDS, fully compliant with the ERC-4626 standard." | [developers.sky.money](https://developers.sky.money/protocol/tokens/susds/) |

## Related terms

- [Yield-bearing stablecoin](/glossary/yield-bearing-stablecoin/)
- [Crypto-collateralised stablecoin](/glossary/crypto-collateralised-stablecoin/)

## See also

- Explainer: [Where does the Sky Savings Rate come from — and who sets it?](https://achivx.com/academy/issuers/where-does-the-sky-savings-rate-come-from.html)
- Review: [revain.org/coins/usds/](https://revain.org/coins/usds/)
- Review: [revain.org/coins/dai/](https://revain.org/coins/dai/)
- Review: [revain.org/projects/maker-sky/](https://revain.org/projects/maker-sky/)

Checked against the sources on 2026-11-01.

## revain.org
- https://revain.org/coins/usds/
- https://revain.org/coins/dai/
- https://revain.org/projects/maker-sky/

## Sources
- https://sky.money/
- https://developers.sky.money/protocol/tokens/susds/