# Flow SRB

FLOWSRB is a benchmark representing the mean, annualized staking rate across all active Flow validators.

FLOWSRB is calculated and published by Staking Rewards via the [Flow Profile](https://www.stakingrewards.com/asset/flow) and [Data API](https://www.stakingrewards.com/data-api).

> **TL;DR:** Flow staking rewards come from epoch-based payouts distributed approximately weekly (52 epochs per year). The reward rate equals the epoch payout divided by total staked FLOW, annualized. Validator-level rates are adjusted by a protocol-level reward cut.

$$
FLOWSRB = (ep / st) \* ey
$$

<table><thead><tr><th width="149">Formula key</th><th width="194">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>ep</td><td>Epoch Payout</td><td>Total FLOW tokens distributed as staking rewards per epoch, read from the FlowIDTableStaking contract's getEpochTokenPayout()</td></tr><tr><td>st</td><td>Staked Tokens</td><td>Sum of all FLOW staked by all participants in the network, read from FlowIDTableStaking.getTotalStaked()</td></tr><tr><td>ey</td><td>Epochs per Year</td><td>Number of epochs per year (52, as Flow epochs are approximately weekly)</td></tr></tbody></table>

* FLOWSRB is non-compounded: it excludes returns from reinvestment of rewards.
* FLOWSRB includes both claimed and unclaimed rewards.
* Flow uses an epoch-based reward distribution model. Rewards are distributed at the end of each epoch (\~7 days).

#### Slashing

* FLOWSRB does not factor in the possibility of slashing occurrences.
* Flow does not currently implement slashing. Validators who fail to meet uptime requirements may have their rewards reduced but are not slashed.

***

### FLOW Validators Staking Reward Rate: FLOWSRB(v)

Staking Rewards calculates the FLOWSRB for each validator based on the protocol-level commission rate (reward cut).

$$
FLOWSRB(v) = FLOWSRB \* (1 - rc)
$$

<table><thead><tr><th width="159">Formula key</th><th width="172">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>rc</td><td>Reward Cut</td><td>The protocol-level reward cut percentage that node operators receive from delegator rewards, read from FlowIDTableStaking.getRewardCutPercentage(). Currently set at 8%.</td></tr></tbody></table>

Note: Flow uses a protocol-level commission (reward cut) that applies uniformly to all validators. Individual validators cannot set custom commission rates. Access nodes (role 5) do not earn staking rewards.

#### Observation Period:

* The FLOWSRB is determined based on the latest epoch data at the point of evaluation.
* This data is then annualized for a comprehensive year-long projection.

#### Calculation

The calculation happens every 2 hours and is immediately published via [Data API](https://www.stakingrewards.com/data-api).

#### Limitations

* FLOWSRB excludes rewards accrued from on-chain transaction fees.
* FLOWSRB employs a 365-day convention for annualizing current epoch times. This convention remains consistent and does not accommodate adjustments for leap years.
* Access nodes (role 5) are included in the validator count but do not earn staking rewards.

### FLOW Real Reward Rate: FLOWSRB^R

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

$$
FLOWSRB^R = (1 + FLOWSRB) / (1 + ir) - 1
$$

<table><thead><tr><th width="140">Formula key</th><th width="144">Metric name</th><th>Description</th></tr></thead><tbody><tr><td>ir</td><td>Inflation Rate</td><td>The annualized inflation rate, calculated as (ep * ey) / ts, where ep is the epoch payout, ey is epochs per year, and ts is the total supply from the FlowToken contract.</td></tr></tbody></table>

**Inflation Rate Behavior**

* Flow's inflation is determined by the epoch token payout set by the protocol. The epoch payout is a governance-controlled parameter that determines how many new FLOW tokens are minted each epoch as staking rewards.
* The current inflation rate is approximately 4.9% annually based on the epoch payout relative to total supply.

***

### Other Flow metrics calculated by Staking Rewards:

<table><thead><tr><th width="190">Metric</th><th>Description</th></tr></thead><tbody><tr><td>Delegated Tokens</td><td>The number of FLOW tokens delegated to node operators by delegators.</td></tr><tr><td>Self Staked Tokens</td><td>The number of FLOW tokens staked directly by node operators.</td></tr><tr><td>Staking Wallets</td><td>The total number of unique delegations on-chain, derived from the delegatorIDCounter for each node.</td></tr></tbody></table>

#### Data Sources:

* [Staking Rewards](https://www.stakingrewards.com/) from indexed Flow Blockchain RPC Endpoints and CoinGecko

***

#### References:

* <https://developers.flow.com/>
* <https://developers.flow.com/build/core-contracts/staking-contract-reference>

***

:books:[ Learn more about FLOW Staking](https://www.stakingrewards.com/asset/flow)

:bar\_chart: [Calculate your FLOW Staking Rewards](https://www.stakingrewards.com/calculator?asset=flow)

:gear: [Access historic FLOW Staking Data via API](https://www.stakingrewards.com/data-api)

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Last updated on 03/23/2026
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