🔆Iota SRB

IOTA Staking Rewards Benchmark (IOTASRB™) Methodology

IOTASRB is a benchmark representing the mean, annualized staking rate across all active IOTA validators.

IOTASRB is calculated and published by Staking Rewards via the IOTA Profile and Staking Data API.

$$IOTASRB = sy / el * re / st$$

Formula key	Metric name	Description
sy	Seconds in year	The number of seconds in a year.
el	Epoch Length	The duration of the epoch in seconds.
re	Rewards Epoch	The number of rewarded tokens per epoch (767000 IOTA).
st	Staked Tokens	The number of staked tokens in the network.

Observations:

• IOTASRB operates on a non-compounded basis, meaning it excludes returns generated from the reinvestment of rewards.

• IOTASRB is based on an assumption of 100% validator efficiency. For a IOTASRB adjusted according to individual validator performance, please refer to IOTASRB(v).

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Slashing

Validators with poor performance may be penalized by slashing the rewards they should have earned during an epoch. If other Validators determine a non-performing or misbehaving Validator, they can vote to slash the rewards of their validator for the epoch where the misbehavior has occurred. If the 2/3rd majority of voting power in an epoch votes in favor of slashing, the rewards that would have been distributed to the validator's staking pool for this epoch will be burned instead, leaving the stakers and the validator without rewards.

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IOTA Validator Staking Rewards Rate: IOTASRB(v)

Staking Rewards calculates the IOTASRB for each validator based on their individual performance and commission rate.

$$IOTASRB(v) = IOTASRB * (1*p)*(1-cr)$$

Formula key	Metric name	Description
p	Performance	The percentage of successfully validated blocks.
cr	Commission Rate	The percentage commission rate the validator has set as a delegation fee for all delegators.

Observation Period:

1. IOTASRB is determined based on the latest generated block at the point of evaluation.

2. This data is then annualized for a comprehensive year-long projection.

Calculation

The calculation happens every 2 hours and is immediately published via Staking Data API.

Limitations

IOTASRB employs a 365-day convention for annualizing current block provisions and daily fees. This convention remains consistent and does not accommodate adjustments for leap years.

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IOTA Real Reward Rate (IOTASRB^R)

The real reward rate calculates the IOTASRB adjusted for inflation in the network.

$$IOTASRB^R = 1+IOTASRB /(1+i)-1$$

Formula key	Metric name	Description
i	Inflation Rate	The annual provisions adjusted by the actual block time of the last 24h and divided by the total token supply in the network.

Inflation Rate Behaviour

• The release of IOTA tokens into circulation is controlled by a predefined schedule.

• Unvested tokens released into circulation are also considered in this calculation.

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Data Sources:

• Staking Rewards from indexed Blocks and Blockchain RPC Endpoints.
• Iota Café.

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References:

• IOTA Whitepaper
• IOTA Docs and Foundation

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Last updated on 05/23/2025