Smart Contract Audit Cost Range 2026 and Trail of Bits Smart Contract Audit Cost Benchmarks

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TL;DR for decision‑makers (January 2026)

• Here are some real, publicly available price points you might want to keep in your back pocket:
  • Trail of Bits: They charge around $25,000 for each engineer per week (as per the ARDC proposal). Check it out here.
  • OpenZeppelin: Also at $25,000 per engineer per week, according to the ARDC proposal. More details here.
  • Runtime Verification: They’re looking at $20,000 a week, but expect at least 3 weeks for every 1,000 lines of code. You can read more here.
  • Dedaub: They charge $3,500 per engineer per day, with a minimum of two auditors. More info here.
  • Spearbit: Their rates are roughly between $32.5k and $48k per team per week, depending on who's on the team. More details here.
  • Quantstamp: They offer a retainer for $130k, which gets you “10 audit weeks (400 hours)” worth of credits, with four auditors on the job. More info here.
• If you're putting together a budget deck, check out these competitive audit budgets:
  • Code4rena contests have been known to have prize pools from $37.5k to over $500k. You can find more details here.
  • Zellic (the company behind Code4rena) is now running contests with no platform fee. They also have a cool refund policy where you get 96% back if no High/Medium issues are found--so you only pay for actual vulnerabilities. More info here.
• Here’s a peek at the expected price ranges for audits in 2026, not counting bounties or coverage:
  • Simple tokens/NFTs: You’re generally looking at $8k to $20k; some quotes can be lower, but that’s usually for more limited scopes. Check out more details here.
  • Mid-tier stuff (like staking/governance): Expect to spend between $15k and $50k. More info here.
  • DeFi protocols: Prices can vary widely, landing anywhere from $40k to over $100k, and for cross-chain/bridges and enterprise projects, it can go from $100k to $300k+. Check out this link for more.
• Don’t forget about rush fees and re-audits:
  • If you need an expedited delivery, expect to pay 20-40% more; also, budget for an additional re-audit. More insights here.
• And let's talk about post-audit defenses:
  • Bug bounties: A good rule of thumb is to set your maximum critical bug payout at 5-10% of the funds-at-risk (FAR). More info here.
  • Optional exploit cover: For Sherlock, premiums usually hover around ~2% for public contests to ~2.25% for private ones, up to about ~$10M capacity. More details here.

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What changed for 2026: more transparent “hard numbers”

The industry finally has solid, procurement-grade numbers from primary sources--no more relying on just anecdotes:

• Trail of Bits recently put forward a proposal for 24 engineer-weeks at a rate of $25k per engineer-week, which totals up to $600k. They laid out the rate and staffing model for the Arbitrum R&D Collective, making this the most concrete price point from ToB that's out there. You can check it out here: (forum.arbitrum.foundation).
• OpenZeppelin matched that same rate of $25k per engineer-week during the ARDC process, reinforcing the idea that this is the going rate for top-tier engineers. More details are available here: (forum.arbitrum.foundation).
• Runtime Verification shared their pricing at $20k/week, along with a quality benchmark of about 3 weeks for every 1,000 lines of code (LOC). This makes it easier to convert LOC into a predictable timeline for your projects. Check it out at (runtimeverification.com).
• Dedaub offered a different angle with a price of $3.5k/day per engineer, albeit with a requirement for at least two auditors. This gives you a daily rate option rather than just weekly ones. More info can be found here: (forum.arbitrum.foundation).
• Quantstamp has a retainer setup for $130k for 10 “audit weeks” (which comes to 400 hours) and includes four auditors for each engagement. This can be really useful when you're trying to figure out effective hourly rates considering credits and retainers. You can read more about it here: (community.venus.io).
• Competitive audits have some clear and publicly available pricing:
  • $37,500 for Garden (Nov 2025), $103,250 for GTE Perps (2025), $120,000 for Ramses (2024), and a whopping $500,000 for Monad (2025). You can see more on this here: (github.com).
  • Code4rena has now dropped all platform fees under Zellic. Their standard model operates on a 96% conditional pool that gets refunded if no High or Medium issues are detected, plus there's a separate judging fee. This definitely makes a difference in how you calculate your “blended cost per issue.” More details are available here: (zellic.io).

Bottom line: you can now back up your 2026 security budget with real public data instead of just relying on vendor PDFs.

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2026 cost ranges you can put in a board slide

• Basic (token, simple vesting): Expect to pay between $8k and $20k for a solid pre-launch review. If you come across an offer that's less than $8k, make sure to clarify what's not included (like re-audits). (sherlock.xyz)
• Moderate (staking, governance, NFT marketplace): This will usually set you back around $15k to $50k. (blockchainappfactory.com)
• DeFi primitives (AMM, lending, perps): For a thorough audit with 2 to 4 auditors working over several weeks, you're looking at a cost of $40k to $100k+. (blockchainappfactory.com)
• High-risk/enterprise (bridges, rollup contracts, multi-chain treasuries): Here’s where things can get pricey--ranging from $100k to $300k and up. When it comes to ongoing programs using formal methods, it's not uncommon to see annual budgets hitting seven figures (like in the case of Certora x Aave). (blockchainappfactory.com)

Speed premium: you can anticipate a boost of 20-40% for quicker turnaround times. Don't forget to account for a re-audit cycle that’s separate from the initial audit. (coredevsltd.com)

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Trail of Bits benchmarks (how to estimate from their public rate)

Trail of Bits’ ARDC application shows a cost of $25k for each engineer per week. You can use this info to create different scenarios:

• MVP Token/Vesting: For the initial audit, we're looking at 2 auditors over 2 weeks, plus an extra half-week for the re-audit:
  • 2.0 weeks × $25k × 2 auditors = $100k (initial audit)
  • 1.0 week × $25k × 1 auditor = $25k (focused re-audit)
  • So, we're estimating a total of about $125k before we even factor in any contests or bounties. You can check out more info on this here.
• Mid-Size DeFi Primitive: If we're dealing with something around 2,500 lines of code, plan on 2 auditors for about 4-6 weeks, plus another 1-2 weeks for a re-audit:
  • That’ll add up to 8-12 engineer-weeks × $25k = $200k-$300k (this is typical pricing).
  • If you’re adding in a contest, expect to include an extra $75k-$150k pool (this is a common range). More details can be found here.
• Enterprise Bridge or Rollup Module: Here, we’ll need 3 auditors for around 6-10 weeks, plus some formal methods:
  • That’s about 18-30 engineer-weeks × $25k = $450k-$750k (this is for a manual review).
  • And if you're considering layer formal verification with dedicated providers, think in terms of programs like Certora which can run in the low- to mid-seven figures annually. You can read more about it here.

Here’s what you can expect with a ToB-class engagement (straight from the ARDC disclosure):

• You'll get named engineers on your project, a dedicated project manager, weekly updates, and the chance to create custom tools that fit your code perfectly--think Slither/Echidna detectors and fuzzing harnesses. Check it out here: (forum.arbitrum.foundation)

Here's a handy tip: if your board gets hesitant about a hefty six-figure line item, try breaking it down by milestones like design review, code review, and re-audit. Then, link the payments to those specific deliverables.

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Public comparables (so your CFO doesn’t think you made it up)

• OpenZeppelin x Venus: They’ve secured a cool $554,400 for 24 weeks of security research over six months, which boils down to about $23.1k per week. This is a solid reference point for figuring out retainer costs. (community.venus.io)
• Certora x Aave (v4 scope, 2025): The price tag here is $2.39M for roughly 4.5 full-time equivalents (FTEs) across a year. Certora is quoting $780k per FTE as their rate, which can help you gauge what to expect for formal-methods programs. (governance.aave.com)
• Dedaub: They're charging $3.5k for each engineer per day, with a minimum of two auditors required. This can be really useful if you're looking for accurate day-level time and materials (T&M) estimates. (forum.arbitrum.foundation)
• Runtime Verification: Their rate is $20k per week, but they also have a quality floor of 3 weeks and 1,000 lines of code. This is great for getting clear scoping on your timelines. (runtimeverification.com)
• Spearbit: They’re blending rates between ~$32.5k and $48k per week for a team of 3 to 5 researchers, which can be helpful for building researcher-network models. (forum.arbitrum.foundation)
• Quantstamp retainer: For $130k, you get 10 “audit weeks” (that's 400 hours) of credits. Each audit is backed by a team of four auditors, which lets you see an effective rate for comparison. (community.venus.io)

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Contest budgets (2024-2025 datapoints you can reuse)

• Here are some real, linkable figures: $37,500 (Garden), $73,000 (Sequence), $103,250 (GTE Perps), $120,000 (Ramses), $150,000 (Starknet), $203,500 (Solana Foundation), and $500,000 (Monad). Check them out here: (github.com)
• As for platform fees, Code4rena is currently operating with zero fees, which is pretty great! Just keep in mind that you might have to pay a judging fee. Also, the 96% conditional pool is mainly there to cover validated High/Medium issues. More details can be found here: (zellic.io)

How to Size a Pool

• Early-stage, moderate complexity: If you're looking at a pool in this range, expect to spend between $50k and $100k and it should take about 7 to 14 days to set up.
• Complex DeFi/bridge: For something more intricate, you’re diving into costs of $150k to $300k, with a timeline of around 14 to 28 days. Make sure to coordinate with a named judge, and you'll need to have some runnable Proofs of Concept (PoCs).
• For predictable costs: If you want to keep things straightforward, go for a conditional pool. This way, you lower your turnout risk and you can run a short, targeted invitational.

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Post‑audit bug bounties and cover (budget lines many teams miss)

• Bug bounty sizing: Immunefi suggests that the max critical bounty should be around 5-10% of your FAR. So, if you're eyeing a $20M TVL target, having a $1M cap is pretty standard for the top programs out there. It’s a good idea to have 2-3 times that max critical set aside to deal with multiple reports. (immunefisupport.zendesk.com)
• Platform fee: Immunefi takes a 10% cut from the bounty paid, so make sure to factor that into your CFO model. (immunefisupport.zendesk.com)
• Optional exploit cover: Sherlock has dropped some numbers on premiums, sitting around 2.0% for public contests and 2.25% for private ones, offering coverage up to about $10M. This can be really helpful for capping tail risk after you launch. (threesigma.xyz)

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Three worked 2026 budget scenarios (numbers you can defend)

1) Pre-Launch MVP (ERC-20 + Simple Vesting, 600 LOC)

• Structured Audit (Weekly Model): We’re looking at about 2 engineer-weeks at a rate of $20k/week (thanks to RV), totaling around $40k. This plan keeps us covered for at least 3 weeks with a 1k LOC floor. Check out Runtime Verification for more details.
• Re-Audit Pass: This could take around 0.5 to 1 week and might run us about $10k to $20k.
• Optional Contest: We can decide to skip this, or if we feel there's a demand from listings, we could go ahead with a $25k to $50k invitational. You can see more on this on GitHub.
• Bounty: Let’s keep it critical at 5-10% FAR. If we set the FAR at $1M, that puts our cap between $50k and $100k, plus we’ll need to factor in a 10% platform fee. For more info, visit ImmuneFi Support.
• Total Planning Range: We’re looking at a ballpark figure of roughly $60k to $120k before we start handing out bounty payouts.

Mid‑size DeFi Primitive (2,500 LOC, Oracles, Upgradeability)

• For a top-notch manual audit, you’re looking at about 8-12 weeks of work from engineers, which would cost around $200k to $300k. Check it out here: Arbitrum Forum.
• If you’re considering a contest, expect it to run you between $100k and $150k over 14-21 days, plus a conditional pool. Judging costs also add up, likely falling in the range of $3k to $15k. More details here: GitHub.
• A re-audit will be a quicker gig, typically taking 1-2 weeks at a rate of about $25k per engineer week, bringing your total to around $25k to $50k.
• When it comes to bounties, you should set aside a maximum critical percentage of 5-10% of the Fully Audited Report (FAR) and have 2-3 times that amount stashed away in reserves for safety. More info can be found here: ImmuneFi Support.
• All in all, when you add up the audit and contest, you're looking at a budget of about $325k to $500k (bounty not included). This hybrid strategy tends to uncover way more actual bugs per dollar spent compared to sticking with just one method.

3) Enterprise Bridge or Rollup Contracts (Cross-Domain Messaging, Validators)

• Expect to spend between $150k and $300k+ for two separate manual audits (done one after the other by different firms). That’s pretty standard. (7blocklabs.com)
• For a formal methods program focusing on invariants, you might be looking at an annual cost between $1.5M and $2.4M, based on what we’ve seen with recent DAO approvals from Certora. (governance.aave.com)
• If you’re considering a contest, plan on budgeting $150k to $300k over a 21-28 day period. Also, unconditional pools can really help to boost participation, especially for newer systems. (outposts.io)
• As for a bug bounty, it’s smart to stick to the higher end of Immunefi’s guidance, especially given the potential impact of any issues. (immunefisupport.zendesk.com)
• And if you want optional coverage, expect to pay around 2% to 2.25% of the amount you want covered, with offerings similar to Sherlock’s (but keep in mind, this depends on capacity). (threesigma.xyz)

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Hidden line items and how to control them

• Just a heads-up: re-audits usually come with a separate bill. Make sure to specify “two fix-review passes included” and set a limit on the difference size for each pass. (runtimeverification.com)
• Watch out for rush fees! They can add an extra 20-40% if you're trying to speed things up. You definitely don’t want to find this out after you've signed. (coredevsltd.com)
• When it comes to triage and judging, contests can help lighten the load by passing that responsibility to experienced judges (for a fee). Don’t forget to factor this into your overall calculations. (zellic.io)
• To avoid scope creep, nail down the commit hash, freeze any feature changes, and ensure you get transparency on change orders--using a weekly model can really help with this. (runtimeverification.com)

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RFP checklist to get comparable quotes (copy/paste into your brief)

• Link to the repo, the exact commit hash, languages used, SLOC, and any dependencies.
• Include the architecture document, threat model, and details on attack surfaces like bridges, oracles, and upgrade paths.
• Provide build/run instructions, along with test coverage percentages and any fuzzing/invariant suites (like Echidna or Foundry). (forum.arbitrum.foundation)
• Outline security objectives, such as pre-launch sign-off, exchange listings, and compliance needs.
• Let us know your preferred model and cadence: are you looking at fixed fees, weekly arrangements, or a retainer? Also, share any re-audit expectations.
• Please share your preferred dates and the level of urgency. Will you be running a contest? If so, what’s the pool size, and are the conditions conditional or unconditional? Who will be judging?
• Specify the reporting format, severity rubric, SLAs, and if you need auditors' names (along with their rates, either weekly or daily).
• We're also interested in seeing sample reports of a similar scope (that are public) and any staffing plans you might have.

With this, you’ll get proposals that are really easy to compare, all tied to public benchmarks.

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Emerging best practices we recommend in 2026

• Hybrid programs as the go-to for real TVL:
  • Think about a manual audit for depth, maybe a contest for breadth, followed by a targeted re‑audit. And don’t forget to set a bounty of about 5-10% FAR. (immunefisupport.zendesk.com)
• Zero‑fee contests (Code4rena under Zellic) shake up ROI:
  • Check out conditional pools that mainly pay for validated High/Medium findings. Oh, and make sure there’s a named judge involved! (zellic.io)
• Weekly rate anchors for negotiation:
  • Use $25k per engagement week (ToB/OZ) and $20k/week (RV) as a sanity check for your quotes and timeframes. (forum.arbitrum.foundation)
• Formal methods where it counts:
  • Set aside those seven-figure budgets for continuous FV across L1, L2, and bridges (Aave/Certora leads the way). (governance.aave.com)
• Retainers and credits for frequent shipping:
  • Consider Quantstamp-style credits (like 400 hours for $130k) which can give you the flexibility needed for those minor releases. (community.venus.io)

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Quick estimator (how to turn LOC and risk into dollars)

• Start with LOC: Kick things off by using RV's 3 weeks/1,000 LOC quality floor to establish your baseline weeks. Check it out here.
• Apply a rate:
  • For RV-style programs, expect about $20k per week; for ToB/OZ class, it's around $25k per engineer-week; and if you're working with a Dedaub engineer, count on $3.5k a day (and usually about 10 days, which is roughly 2 weeks). More details can be found here.
• Add re-audit: Budget for about 25-40% of the initial effort for a re-audit (or even more if there are any design changes).
• If funds-at-risk are significant:
  • Contest: Expect typical costs between $75k and $150k; make sure the timing matches the risks of when you'll release. More info here.
  • Bounty: Set the maximum critical at 5-10% of your funds-at-risk and keep 2-3 times that in reserve. Details can be found here.
  • Optional cover: If you want to protect against tail risk, consider around 2%-2.25% of the amount you’re covering. More insights here.
• In a hurry? Factor in an extra 20-40%. Check out more about that here.

Example: 2,500 LOC DeFi Launch

• Baseline: Plan for around 7.5 weeks based on the RV rule, so let's round it up to about 8-10 weeks.
• Rate: If we're using two auditors from the ToB class, that translates to roughly 16-20 engineer-weeks at $25k each. So, we're looking at a total of $400k-$500k. Don’t forget to include the cost for a re-audit, which might take an extra 1-2 weeks, plus a contest budget around $100k-$150k, and some funds set aside for bounties. Check out more details at runtimeverification.com.

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Common questions from CFOs and how to answer them

• “What’s the deal with ToB/OZ costing more than some boutique quotes?”
  Well, it all comes down to having high-caliber talent, solid processes and tools, plus a history of success--just look at ARDC’s $25k/eng-week disclosures. (forum.arbitrum.foundation)
• “How about we just run a contest?”
  Contests can bring up a lot of issues pretty quickly, but they often miss out on that deeper design-level teamwork. The standout programs combine structured reviews with contests and then a re-audit. Recent data really highlights the actual costs involved in securing quality bandwidth quickly. Check it out here: (github.com)
• “What size bounty are we thinking?”
  Check out Immunefi’s advice: aim for a bounty that's around 5-10% of the total funding raised (FAR). Plus, it's a good idea to pre-fund at 2-3 times your maximum critical cap. (immunefisupport.zendesk.com)
• “So, what's the ROI looking like for contest providers these days?”
  With Code4rena, you don't have to worry about platform fees--it's zero! Plus, with conditional pools, your main costs are for validated High/Mediums and the judging. Check it out here: (zellic.io)

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Final takeaways

• Think of the 2026 security budgeting as more of a program rather than just a purchase order. You should go through a structured audit → contest → re-audit → bounty (+ maybe some optional coverage).
• Check out the public benchmarks mentioned in this post to help you negotiate rates and set realistic expectations:
  • $20k/week (RV), $25k/eng-week (ToB/OZ), $3.5k/engineer-day (Dedaub), $37.5k-$500k for contest pools, bug bounties sitting at 5-10% FAR, and around ~2% for cover premiums. (runtimeverification.com)

If you're looking for a vendor-neutral scoping session, make sure to bring along your commit hash, SLOC, architecture diagram, and your target dates. We'll help turn your risks into a solid, evidence-based security budget for 2026, all based on these public benchmarks.