0.005 ETH

Create an ERC-20 Token with a Max Supply Cap

The Max Supply Cap sets a hard, immutable upper limit on the total number of tokens that can ever exist. Once set at deployment, this cap cannot be changed — even the contract owner cannot mint tokens beyond it. This provides the strongest possible scarcity guarantee for your token.

How It Works

The max supply cap is enforced by overriding the internal `_mint()` function with a check: `require(totalSupply() + amount <= maxSupply)`. If any mint operation would exceed the cap, the transaction reverts. The cap is set in the constructor and stored as an immutable variable.

Solidity Implementation

uint256 public immutable maxSupply;

constructor(uint256 _maxSupply) {
    maxSupply = _maxSupply;
}

function _mint(address to, uint256 amount) internal override {
    require(totalSupply() + amount <= maxSupply, "Exceeds max supply");
    super._mint(to, amount);
}

Use Cases

Fixed Supply Tokenomics

Create a token with a Bitcoin-like hard cap that guarantees scarcity over time.

Investor Confidence

Prove to investors and holders that supply inflation is mathematically impossible beyond a set limit.

Anti-Inflation Guarantee

Combine with Mintable to allow flexible minting up to a hard ceiling — the best of both worlds.

Deflationary Model

Combine with Burnable to create a supply that can only decrease from the cap, never increase beyond it.

Frequently Asked Questions

Can the max supply cap be changed after deployment?

No. The max supply is stored as an immutable variable, meaning it is set once in the constructor and can never be modified. This is enforced at the EVM level.

What happens if someone tries to mint beyond the cap?

The transaction will revert with an error. No tokens will be created, and no gas will be consumed beyond the failed check (though the base gas fee is still paid).

Is Max Supply Cap different from initial supply?

Yes. Initial supply is the number of tokens minted at deployment. Max supply is the absolute ceiling. You can set initial supply to 1,000,000 and max supply to 10,000,000, allowing future minting up to the cap.

Technical Details

OpenZeppelin Contract:Custom _mint override with immutable maxSupply

Related Features

Create a Max Supply Cap Token

Deploy a secure, verified smart contract with the Max Supply Cap feature on Ethereum in minutes. No coding required.

Create a Max Supply Cap Token

All Features

0.005 ETH

Create an ERC-20 Token with a Max Supply Cap

How It Works

Solidity Implementation

uint256 public immutable maxSupply;

constructor(uint256 _maxSupply) {
    maxSupply = _maxSupply;
}

function _mint(address to, uint256 amount) internal override {
    require(totalSupply() + amount <= maxSupply, "Exceeds max supply");
    super._mint(to, amount);
}

Use Cases

Fixed Supply Tokenomics

Create a token with a Bitcoin-like hard cap that guarantees scarcity over time.

Investor Confidence

Prove to investors and holders that supply inflation is mathematically impossible beyond a set limit.

Anti-Inflation Guarantee

Combine with Mintable to allow flexible minting up to a hard ceiling — the best of both worlds.

Deflationary Model

Combine with Burnable to create a supply that can only decrease from the cap, never increase beyond it.

Frequently Asked Questions

Can the max supply cap be changed after deployment?

No. The max supply is stored as an immutable variable, meaning it is set once in the constructor and can never be modified. This is enforced at the EVM level.

What happens if someone tries to mint beyond the cap?

The transaction will revert with an error. No tokens will be created, and no gas will be consumed beyond the failed check (though the base gas fee is still paid).

Is Max Supply Cap different from initial supply?

Technical Details

OpenZeppelin Contract:Custom _mint override with immutable maxSupply

Related Features

Mintable

0.01 ETH

Burnable

0.01 ETH

Ownable

0.01 ETH

Create a Max Supply Cap Token

Deploy a secure, verified smart contract with the Max Supply Cap feature on Ethereum in minutes. No coding required.

Create a Max Supply Cap Token