Choosing between a contingency audit firm, CPA, BPO, and software depends on your lease count, CAM spend, and how quickly you need results. Here's the framework.
Run the audit before you decide whether this applies to your lease.
Find My OverchargesFind overcharges in your CAM reconciliation. Most audits complete in under 5 minutes.
Find My OverchargesSee a sample report firstMost commercial tenants who decide to audit their CAM charges face the same question immediately: who should actually do it?
This page is for buyers who already know an audit is worth doing and now need to decide which provider model fits their lease count, internal resources, and timing constraints. Review the sample report before any vendor conversation gets abstract. Review pricing when you are comparing fee structures and need the exact flat-fee baseline.
The options are meaningfully different. A contingency audit firm earns 25% to 40% of whatever they recover. A CPA charges flat hourly rates of $150 to $350 and delivers a signed professional opinion. A BPO firm handles high-volume portfolio work at project rates that can reach $80,000 per reconciliation cycle. Software like CAMAudit costs $199 and returns results in under five minutes.
None of these is right for every tenant. The choice depends on your specific situation: how many leases you manage, your annual CAM spend, how quickly you need answers, and what you plan to do with the findings once you have them.
This guide walks through each provider type, the criteria that should drive your decision, the questions to ask before hiring anyone, and the red flags that should make you walk away.
Software processes your lease and reconciliation statement automatically, applies a set of detection rules, and returns a structured finding report. CAMAudit uploads your PDFs, extracts the relevant lease provisions using Claude Sonnet 4.6, and runs 13 deterministic detection rules covering management fee overcharges, pro-rata share errors, gross-up violations, CAM cap violations, base year errors, and excluded expense classifications.
Cost is flat-fee: $199 for one audit, $499 for three, $699 for five. Results come back in under five minutes. If you find overcharges, CAMAudit generates a dispute letter draft citing the specific lease provision and dollar calculation.
Best for: Tenants with 1 to 20 locations who need accurate findings quickly and do not want to share a percentage of recovery. Also useful as a first pass across a larger portfolio before deciding which leases to escalate to a firm.
Limitation: Software requires readable, machine-parseable documents. Heavily redacted, handwritten, or very poorly scanned leases may reduce extraction confidence.
Contingency firms like Occupancy Cost Audit Group, CTS, or Trigild specialize in lease audits and earn their fee from a percentage of what they recover. They send formal audit dispute notices, manage the landlord relationship, and push disputes through to resolution.
The standard contingency split is 25% to 40% of recovered amounts. Some firms also charge a retainer ($500 to $2,000) or travel fees for on-site document review. The upside is that you pay nothing if they find nothing. The downside is that a $30,000 recovery nets you $18,000 to $22,500 after the firm's fee.
Timeline is 3 to 9 months from engagement to resolution. These firms work multiple clients simultaneously, and landlord responses take time.
Best for: Tenants with large suspected overcharges ($20,000 or more) and an adversarial landlord relationship where the formal audit process and dispute expertise justify sharing the recovery.
Limitation: Selection bias. Contingency firms focus attention on leases where they expect large recoveries. Small overcharges on smaller leases get less attention.
CPAs with commercial lease experience and independent lease auditors charge hourly rates ($150 to $350 per hour) or flat project fees ($1,500 to $5,000 per audit). They produce a written report with professional sign-off, which carries more weight in some dispute situations than a software output.
Best for: Tenants who need professional credentialed output (often required for institutional investors or lenders reviewing lease portfolios), or tenants with complex leases involving unusual provisions like anchor exclusions or multi-building pro-rata calculations.
Limitation: Slower than software (1 to 3 weeks typical), more expensive than software, and the quality varies significantly by practitioner experience. Not all CPAs have deep commercial lease auditing expertise.
BPO firms handle CAM reconciliation review at scale. They abstract lease provisions into a structured database, then verify each reconciliation against those abstractions. Springbord and similar firms primarily serve multi-location retail and restaurant chains with 50 to 500 locations.
Pricing runs $50 to $200 per hour or project rates that can reach $20,000 to $80,000 per reconciliation cycle for a large portfolio. The timeline is 2 to 6 weeks per cycle.
Best for: Multi-location chains that need annual reconciliation review as a managed, ongoing service and also need lease abstraction support.
Limitation: BPO firms work from checklists. They catch obvious exclusions and math errors but are less reliable on structural errors like fee-on-fee calculations or gross-up applied to fixed expenses. Expensive for small portfolios.
The economics change dramatically at different scales.
For 1 to 5 locations: software is clearly the right starting point. At $199 per audit, the cost is trivially small compared to any likely recovery. A contingency firm for a single location only makes sense if you have a specific large suspected overcharge.
For 5 to 20 locations: software can handle this at $699 for five audits. For the full portfolio, the flat-fee model scales cleanly. If findings cluster heavily at specific locations, escalate those to a CPA or contingency firm.
For 20 to 50 locations: software plus selective escalation. Run software across the portfolio to identify the top 5 to 10 leases by finding amount, then decide whether any of those warrant a contingency firm engagement.
For 50+ locations: BPO for systematic annual review. Software for high-priority locations or spot-checks.
This is the single most important financial variable. A location paying $80,000 per year in CAM has much more at stake than one paying $12,000.
If your CAM spend per location is below $20,000 per year: the economics strongly favor software. Even a 20% overcharge (which would be significant) produces a $4,000 recovery. A contingency firm at 30% would keep $1,200 of that. At $199 for software, you keep $3,801.
If your CAM spend is $50,000 to $150,000 per year: software is still the right first step, but if you find overcharges in the $15,000 to $30,000 range, a CPA or contingency firm adds credibility to the dispute.
If your CAM spend exceeds $200,000 per year: a contingency firm or CPA is probably worth engaging in addition to software, because the dollar amounts involved justify the cost of professional expertise.
Most retail and restaurant NNN leases are structurally similar. The standard provisions (CAM pool definition, management fee, pro-rata share denominator, gross-up, CAM cap) appear in predictable places and have predictable ranges.
Complex leases involve: anchor tenant exclusions that affect your pro-rata denominator, co-tenancy clauses, multi-building or multi-property CAM pools, unusual base year definitions, or heavily negotiated custom amendments. If your lease has these features, software accuracy depends on clean extraction of unusual provisions. A CPA with the lease in hand adds a judgment layer that software does not have.
Software: results in under five minutes. CPA or flat-fee auditor: 1 to 3 weeks. BPO: 2 to 6 weeks. Contingency firm: 3 to 9 months from engagement to resolution.
If your dispute window closes in 30 days, software is the only option that gets you findings before the deadline. Most leases give you 90 to 180 days from receipt of the reconciliation to raise disputes. If you are early in that window, any provider can work. If you are approaching the deadline, software is the only safe choice.
Do you want to audit every reconciliation every year? Or do you want to check one specific year because something looks wrong?
Software scales to ongoing use at flat cost. At $199 per audit, auditing annually across 5 locations costs $995 per year, less than a single hour of contingency firm time. If you want a systematic program of annual reviews, software is the infrastructure.
A contingency firm engagement is typically one-time or project-based. They audit the years in scope, resolve the dispute, and the engagement ends. If you want ongoing protection, you need a different model.
If you have a lease administrator on staff who understands pro-rata calculations, gross-up mechanics, and CAM cap formulas, they can work alongside software findings to sharpen the analysis. If your team has no commercial lease expertise, software findings are still actionable but the dispute letter drafting benefits from professional review before sending.
If you decide a contingency firm is right for your situation, get specific answers to these questions before signing an engagement letter.
What is your contingency rate? Get the exact percentage. Industry standard is 25% to 40%. Anything above 40% is aggressive. Ask if the rate changes based on recovery amount.
What years do you audit by default? Some firms audit only the current reconciliation year. Others pursue the full lookback period your lease allows (typically 2 to 4 years). If you have a 4-year lookback right and the firm only audits 2 years, you are leaving money on the table.
Who has access to our lease documents? If the firm outsources document review to offshore analysts, understand who sees your confidential lease terms and financial data.
What happens if you find nothing? Most contingency firms charge nothing if they find nothing. Confirm this explicitly. Some charge a retainer or administrative fee regardless of findings.
How do you handle landlord pushback? Does the firm mediate, or does it litigate? What is their track record on disputed findings? Ask for examples of how they resolved situations where the landlord rejected their audit findings.
What does your engagement letter look like? Read the full engagement letter before signing. Key items: exclusivity clauses (are you prohibited from hiring another auditor?), multi-year commitments, and definitions of what counts as "recovered" for purposes of calculating the contingency fee.
The firm will not disclose their contingency percentage before engagement. If they say "we'll determine the rate based on the complexity of your situation," that is not a standard practice. Standard practice is a disclosed percentage stated in the engagement letter.
The firm requires an exclusive multi-year agreement. A two- or three-year exclusivity clause means you cannot audit those years yourself or with another provider during that period, even if the firm does not actively work those years. Walk away from broad exclusivity.
The firm cannot explain their methodology. A qualified firm should be able to describe specifically how they check pro-rata share denominators, management fee calculations, and gross-up provisions. If the answer is "our experts review everything," that is not a methodology.
The firm pressures you to act before your dispute window closes. Urgency tactics that create artificial time pressure are a sales technique, not a genuine service posture. Your dispute window is your lease deadline. The firm knows when it is. You should too, and you should not be rushed.
The firm promises a specific recovery before reviewing your documents. No professional can estimate a recovery before reviewing the lease and reconciliation statement. Anyone who tells you "we typically recover $15,000 to $50,000 for tenants like you" before seeing your documents is selling, not auditing.
Here is the practical logic. Before you hire any external provider, you do not know whether your reconciliation has errors. Running CAMAudit first tells you in five minutes.
If the findings are minor (a $1,200 management fee discrepancy, for example), you can send a dispute letter draft directly from the platform and handle it yourself. No firm needed, no contingency split.
If the findings are large ($25,000 in gross-up violations, for example), you now have a documented finding with specific lease citations. You can use that finding as the basis for a firm engagement, and you walk into the conversation knowing exactly what errors exist rather than starting from zero.
“I built CAMAudit so tenants could know what they are dealing with before deciding whether to hire anyone. The finding tells you what the error is, how much it costs, and which lease provision it violates. That information changes how every downstream conversation with a firm or a landlord goes.”
| Provider type | Cost model | Time to results | Best for | Key limitation |
|---|---|---|---|---|
| CAMAudit software | $199 to $699 flat | Under 5 minutes | 1-20 locations, any annual reconciliation | Document quality dependent |
| Contingency firm | 25-40% of recovery | 3-9 months | $20,000+ findings, adversarial landlords | Fee sharing, slow, selection bias |
| CPA / flat-fee auditor | $150-$350/hr or $1,500-$5,000 flat | 1-3 weeks | Complex leases, credentialed output | Varies by practitioner, slower |
| BPO outsourcing | $50-$200/hr or project | 2-6 weeks | 50+ locations, ongoing abstraction needed | Expensive at small scale, checklist-based |
For a breakdown of CAM audit costs across all provider types, see the CAM audit cost guide. For the full comparison of in-house vs. outsourced vs. software, see the in-house vs. outsourced vs. software guide.
Upload your lease. CAMAudit runs 13 detection rules in under 5 minutes.
Find My OverchargesBefore you choose any provider, inspect what "good output" looks like:
If the output and economics work for your team, start your free audit and use your own documents as the real evaluation dataset.