Smart Contract Audit: What It Actually Reveals
What a smart contract audit actually checks, what it costs, and the critical findings most teams miss — from an engineer who has conducted them.
Executive Summary
A smart contract audit is not a certification of security — it is a snapshot of known vulnerabilities at a point in time. Comprehensive audits cover reentrancy, integer overflow, access control, gas optimization, and economic attack vectors. Budget $15K–$80K and 2–6 weeks depending on complexity.
Most founders treat a smart contract audit as a rubber stamp. It is not. An audit is a systematic search for vulnerabilities — and the best audits find problems that would have cost millions.
What a Comprehensive Audit Covers
What an Audit Does NOT Cover
An audit examines your code at a specific point in time. It does not cover: vulnerabilities introduced after the audit, economic design flaws in your tokenomics, off-chain infrastructure weaknesses, or social engineering attacks against your team. It is one layer of defense, not a guarantee.
Audit Cost Breakdown
Audit costs scale with lines of code and complexity. A simple ERC-20 token costs $5K–$15K. A DeFi protocol with multiple yield strategies costs $40K–$80K. A full protocol with governance, staking, and cross-chain bridges can exceed $100K. Always budget for a re-audit after fixing findings.