🟢Phala SRB

Phala Network Staking Rewards Benchmark (PHASRB™) Methodology

PHASRB is a benchmark representing the annualized staking rate for the PHA token.

PHASRB is calculated and published by Staking Rewards via the Phala Profile and Data API.

PHA Staking Rewards Rate: PHASRB

$$PHASRB = aprMult * budget * (1 - tr) * t_y / shares$$

Formula Key	Metric Name	Description
aprMult	APR Multiplier	The average APR multiplier across all active stake pools, reflecting compute worker performance.
budget	Budget Per Block	The PHA reward budget emitted per block to compute workers.
tr	Treasury Ratio	The fraction of block rewards directed to the treasury.
shares	Idle Worker Shares	Total shares representing idle compute capacity in the network.
$t_y$	Year Constant	365 * 86400 seconds — seconds per year, used to annualize the per-block reward based on average block time.

• PHASRB is non-compounded, excluding returns from reinvestment of rewards.

• Phala uses a compute-based staking model where rewards are tied to worker performance, not traditional block production.

• Stakers delegate PHA to stake pools, which bind compute workers. Rewards depend on the pool's compute contribution.

Slashing

• PHASRB does not factor in the possibility of slashing occurrences.

• Phala's stake pools may lose workers if they go offline, reducing the pool's compute capacity and rewards, but staked tokens are not directly slashed.

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PHA Stake Pool Reward Rate: PHASRB(v)

Staking Rewards calculates the PHASRB for each stake pool based on the pool's individual APR multiplier and commission rate.

$$PHASRB(v) = aprMult_v * budget * (1 - tr) * t_y / shares$$

Formula key	Metric Name	Description
aprMult_v	Pool APR Multiplier	The specific pool's APR multiplier, reflecting its workers' compute performance.
budget	Budget Per Block	The PHA reward budget per block.
tr	Treasury Ratio	The fraction directed to treasury.
shares	Idle Worker Shares	Total idle worker shares in the network.
$t_y$	Year Constant	Seconds per year.

• Each stake pool has a different APR multiplier depending on its bound workers' performance and capacity.

• Pool operators set a commission rate that is deducted from delegator rewards.

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Observation Period:

1. The PHASRB is determined based on current network state at the evaluation point.

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

Calculation

The calculation happens every 6 hours and is immediately published via Data API.

Limitations

1. PHASRB employs a 365-day convention for annualizing reward data. This convention remains consistent and does not accommodate adjustments for leap years.

2. Phala's reward model is compute-driven, meaning actual returns depend on worker uptime and performance, which can vary significantly between pools.

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PHA Real Reward Rate: PHASRB^R

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

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

Formula key	Metric name	Description
ir	Inflation Rate	Phala's inflation rate is currently reported as 0% as the network does not use traditional era-based inflation. Compute rewards are funded from a pre-allocated budget.

Inflation Rate Behavior

• Phala does not use a traditional NPoS inflation model. Instead, compute rewards are distributed from a pre-allocated budget per block. The total PHA supply is fixed at genesis, and rewards come from the subsidy pool rather than through new token minting.

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Other Phala metrics calculated by Staking Rewards:

Metric	Description
Delegated Tokens	The total PHA tokens delegated to stake pools by delegators.
Staking Wallets	Total number of delegations across all stake pools.

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Data Sources:

• Phala Substrate RPC (on-chain Balances pallet for total issuance)

• Phala SubSquid GraphQL API (stake pool data, compute metrics, delegation data)

• CoinGecko for price and circulating supply

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References:

• Phala Network Documentation

• Phala Tokenomics

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📚 Learn more about PHA Staking

📊 Calculate your PHA Staking Rewards

⚙️ Access historic Phala Staking Data via API

Last updated on 03/16/2026