Quick answer: A smart contract audit costs between $5,000 and $250,000+ in 2026. A simple ERC-20 token runs $5,000–$15,000. A mid-complexity DeFi protocol runs $40,000–$100,000. A cross-chain bridge or enterprise multi-chain system runs $150,000–$500,000+. But the number that matters more than any of these ranges is this: identical scopes, quoted by equally credible firms, come back 3 to 5 times apart. Which means the single most expensive mistake in audit procurement is accepting the first quote you're given.
Procur3 is a neutral marketplace. We don't perform audits and we don't take a side on which firm you hire, so this guide reflects what quotes actually look like across the market rather than what any one firm wants you to believe about its own pricing.
Smart Contract Audit Cost by Protocol Type (2026)
| Protocol type | Approx. nSLOC | Price range | Typical timeline |
|---|---|---|---|
| ERC-20 token (custom logic) | 200–500 | $1,000–$10,000 | 1–2 weeks |
| NFT collection (ERC-721/1155) | 500–1,500 | $3,000–$30,000 | 2–3 weeks |
| Staking / vault protocol | 1,000–3,000 | $5,000–$60,000 | 3–4 weeks |
| Lending protocol or AMM | 3,000–8,000 | $15,000–$150,000 | 4–8 weeks |
| Governance / DAO system | 1,000–5,000 | $10,000–$80,000 | 3–5 weeks |
| Cross-chain bridge | 5,000–15,000+ | $50,000–$500,000+ | 6–12 weeks |
| Audit contest (prize pool) | any | $10,000–$200,000+ | 1–4 weeks |
These are market ranges, not quotes. Two things are missing from almost every budget we see: the remediation review (a fix-verification pass, typically 10–20% of the base fee, and effectively mandatory), and the reality that a firm's quote also moves with its current bench utilisation. A firm with an idle team next month quotes very differently from the same firm three weeks earlier.
What Actually Drives the Price
Codebase size and complexity. Most firms price from normalised source lines (nSLOC), then apply a complexity multiplier. But raw line count is the weakest of the inputs. A 500-line contract with twelve external integrations, an upgradeable proxy pattern and custom math will cost more than a clean 2,000-line token. What genuinely moves the number is external dependencies, upgrade mechanisms, novel math, assembly, cross-chain messaging and ultimately, what you want to include in the scope.
Chain and programming language. This is the largest premium in the market, and it is a supply problem rather than a technical one. Solidity has the deepest auditor pool globally, which anchors base pricing. Rust-based Solana programs carry roughly a 25–40% premium. Cairo (Starknet) and Move (Sui, Aptos) sit around 30–45% above EVM equivalents. ZK circuit work — circom, Halo2, Plonky2 — routinely runs 80–120% above the EVM baseline because the qualified reviewer pool is tiny. If you're on a non-EVM stack, see our guide to Rust and Solana audit firms.
Code readiness. The cheapest lever you control. A codebase with 90%+ test coverage, documented integrations, a written spec and NatSpec comments gets audited faster and cheaper, because reviewers spend their hours on logic rather than reverse-engineering intent. Teams that arrive prepared regularly see 20–30% off the same firm's quote for the same code.
Urgency. Compressed timelines add 20–40%. Flexible start dates earn discounts. Firms price scheduling friction directly, and they should.
Firm tier and brand. Top-tier firms charge 2–3x mid-market rates for comparable scope. Some of that is depth. Some of it is the certificate itself, which carries real weight with exchanges during listing review and with investors during diligence. Whether that premium is worth paying depends entirely on your TVL and who you need to convince.
Why the Same Scope Gets Quoted 3–5x Apart
This is the part of the market almost nobody publishes. When a single scope is put to multiple qualified firms at once, the spread between the lowest and highest credible quote is routinely three to five times.
The reason is simple: in an opaque market, sellers price-discriminate. Each firm quotes from its own utilisation, brand position, and appetite for your protocol category. Nothing forces those numbers to converge unless the buyer creates competition.
The defence is structural, not tactical. Put the same well-written scope to 5–10 matched firms simultaneously, with the same deadline, and compare the full package: price, named auditors, timeline, and whether the retest is included. On Procur3, posting a scope is free for builders and first quotes typically arrive in under an hour. 100+ teams have used us to collect competitive bids, saving $200,000+ without compromising auditor quality.
Is an Audit Worth It? The Blunt Maths
The average loss per smart contract exploit over the past four years is approximately $1.9 million. H1 2026 alone recorded $1.31 billion in losses across 344 incidents.
Against that, a $70,000 audit on a mid-complexity DeFi protocol is not a large line item. But the more useful framing is exposure-based: estimate your peak TVL, apply a realistic exploit probability for an unreviewed protocol of your complexity, and compare the expected loss against the cost of review. For most protocols targeting meaningful TVL, that calculation is not close.
One caveat worth stating plainly: a cheap audit from a firm with no verifiable track record is not a saving, it's a purchased document. Compare firms on public audit history, findings by severity and post-audit incident record — not on price alone.
Where Teams Waste Audit Budget
Auditing before the code is ready. Every architectural change after kickoff either invalidates findings or triggers a re-review. Stabilise first.
Skipping the remediation review. Fixes introduce bugs. A retest is typically included in the price so use it.
Treating the audit as permanent. It covers one commit. Ship fourteen PRs and a new integration, and your audit describes code that no longer exists. Budget for diff reviews on material changes.
Buying one layer and calling it a security programme. H1 2026's losses concentrated in key management, multisig governance and operational compromise — not contract code. An audit doesn't cover your signing environment. On Procur3, posting a scope for each component of your stack is readily available. Post a RFP for your web2 code, cloud and infrastructure reviews, pentesting, real-time monitoring service and more.
Budget Guide for 2026
A realistic pre-launch budget for a mid-complexity DeFi protocol is $60,000–$120,000, inclusive of the initial audit and one remediation pass. Add 30–120% for Rust, Cairo, Move or ZK stacks. Add 20–40% if you need it fast. Protocols with meaningful TVL typically run total annual security spend of $150,000–$500,000 once contests, bounties and monitoring are included.
Whatever tier you're buying in, the highest-leverage action is the same: make firms compete for the same scope. Post an RFP on Procur3 and compare real quotes side by side — free for builders, first responses in hours.
FAQ
How much does a smart contract audit cost in 2026? Between $1,000 and $250,000+ depending on complexity. Simple token contracts run $1,000–$10,000, mid-complexity DeFi protocols $20,000–$100,000, and cross-chain bridges or enterprise systems $150,000+.
How much does a Solana or Rust audit cost? Roughly 25–40% above the Solidity equivalent for the same scope, because the pool of qualified Rust reviewers is far smaller than the EVM pool.
How long does a smart contract audit take? Roughly 1–2 weeks for a small token, 3–4 weeks for a standard DeFi protocol, and 6–12 weeks for a bridge or large multi-chain system — plus remediation. Top firms also carry 4–12 week booking queues, but here are many boutique audit firms who can accommodate sooner.
Why do audit quotes vary so much for the same code? Because pricing reflects each firm's utilisation, brand position and category appetite, not a market rate. Quotes on identical scopes routinely land 3–5x apart. Competitive quoting is the only reliable way to discover what your audit should actually cost.
Can I lower my audit cost? Yes, three ways: arrive with high test coverage and complete documentation (20–30% saving), stay flexible on start date, and put your scope to multiple firms at once using Procur3.io, instead of negotiating blind against one quote.