The short answer with real numbers
A simple token or basic contract often lands between $3,000 and $8,000 to design and ship. A complex DeFi system commonly runs $50,000 to $200,000 or more once you count architecture, testing, and serious review time.
Audit fees sit on top of build cost. Skipping them to save money is how teams lose everything later.
What determines the cost of a smart contract
Complexity, number of contracts, external integrations, upgrade patterns, and audit requirements move the price. So does how clean your product rules are. Vague tokenomics become expensive engineering.
Cost breakdown: Simple Token vs Staking vs DeFi vs RWA
Simple Token Contract. Build cost: about $3,000 to $8,000. Audit cost: often $5,000 to $15,000 depending on firm and scope. Timeline: about 1 to 3 weeks for build, longer with audit. Ongoing maintenance: low if the contract is immutable and simple.
Staking Contract. Build cost: about $10,000 to $40,000. Audit cost: often $15,000 to $40,000. Timeline: about 3 to 8 weeks plus audit. Ongoing maintenance: medium, especially around rewards and edge cases.
Full DeFi Protocol. Build cost: about $50,000 to $200,000+. Audit cost: often $40,000 to $150,000+ across rounds. Timeline: months, not weeks. Ongoing maintenance: high, with monitoring and incident readiness.
RWA Platform contracts. Build cost: commonly $80,000 to $250,000+ for the on chain piece alone, before the full product. Audit cost: high because compliance and transfer logic matter. Timeline: several months. Ongoing maintenance: high, tied to legal and ops changes.
The hidden cost most clients miss: security audits
An audit is not optional decoration. It is part of the product cost. Teams that skip it to ship faster often pay in lost funds, lost trust, or a full rewrite. Budget the audit when you budget the build.
How LLM costs and deployment gas fees factor in
LLM tools can speed documentation and test scaffolding. They do not replace review. Gas fees for deploy and setup are usually small next to engineering and audit, but mainnet mistakes are expensive to undo. Price the dry runs and the ops checklist, not only the deploy transaction.
How to scope a smart contract project to control cost
One clear job for v1. Fewer contracts. Fewer external calls. No upgradeability unless you truly need it. Freeze tokenomics before coding. Pay for tests and an audit instead of five speculative features.
Questions to ask before getting a quote
What is in v1 and what is out? Who pays for the audit? Who owns the repo? What is the testnet plan? What does incident response look like after mainnet? Nextelligentia quotes from fixed scope so you see those answers before work starts.
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