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Calcimator

Smart Contract Audit Cost Calculator

Estimate smart contract audit costs based on code size, complexity, auditor tier, and timeline urgency.

Inputs

Results

Total Audit Cost ($)

$16,000.00

≈ 8 gaming PCs

Estimated Timeline (days)

9

Single Audit Cost ($)$10,000.00
Effective Cost / LOC ($)$32.00
Recommended Bug Bounty ($)$48,000.00
Total Security Budget ($)$64,000.00
How to Use This Calculator
  1. Enter Lines of Solidity Code excluding tests — a simple token is ~100 LOC, Uniswap V3 core is ~2,500 LOC.
  2. Set Complexity Level: 1 = simple token, 2 = DeFi protocol, 3 = complex/upgradeable, 4 = critical (bridge/lending).
  3. Choose Auditor Tier: 1 = top firm (Trail of Bits, OpenZeppelin), 2 = mid-tier (Halborn, CertiK), 3 = boutique.
  4. Set Number of Audit Firms — two independent audits is best practice for DeFi protocols.
  5. Review Total Audit Cost, Estimated Timeline in days, and Total Security Budget (audit + bug bounty) to plan your launch schedule.

How the result changes with Lines of Solidity Code

Lines of Solidity CodeTotal Audit Cost ($)Estimated Timeline (days)
10,001$320,032.0072
35,001$1,120,032.00239
65,000$2,080,000.00439
90,000$2,880,000.00605

What each input means

Lines of Solidity Code
Total Solidity LOC including libraries (excluding tests). Uniswap V3 core ~ 2,500 LOC.
Complexity Level (1-4)
1 = Simple token, 2 = DeFi protocol, 3 = Complex (upgradeable/cross-chain), 4 = Critical (bridge/lending).
Auditor Tier (1-3)
1 = Top firm (Trail of Bits, OZ), 2 = Mid-tier (Halborn, CertiK), 3 = Independent/boutique.
Number of Audit Firms
Number of independent audits. Two audits is best practice for DeFi protocols.
Urgency (1-3x)
1x = Standard timeline, 2x = Rush (faster but more expensive), 3x = Emergency.

What each result means

Total Audit Cost ($)
Combined cost for all audit firms.
Single Audit Cost ($)
Cost for one audit firm.
Estimated Timeline (days)
Business days to complete audit including report delivery.
Effective Cost / LOC ($)
All-in cost per line of audited code.
Recommended Bug Bounty ($)
Suggested bug bounty pool (typically 3x audit cost).
Total Security Budget ($)
Audit cost plus recommended bug bounty.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Lines of Solidity Code = 500, Complexity Level (1-4) = 2, Auditor Tier (1-3) = 2, Number of Audit Firms = 2 = 5 input(s) provided
  2. Calculate Total Audit Cost
    Total Audit Cost = totalAuditCost + (totalAuditCost * 0.6 * (numberOfAuditors - 1))
    16000 = $16,000
  3. Calculate Estimated Timeline
    Estimated Timeline = ceil(auditDays / urgencyMultiplier) + 5
    9 = 9
  4. Calculate Single Audit Cost
    Single Audit Cost = baseAuditCost * urgencyMultiplier
    10000 = $10,000
  5. Calculate Effective Cost / LOC
    32 = $32

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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