In 2026, technology due diligence for a PE or VC deal typically costs between $10,000 and $150,000, depending on scope and provider. A focused red-flag review commonly runs $10K–$35K and is delivered in days. A full assessment from a specialist firm commonly runs $35K–$95K over one to three weeks. The same scope from a Big Four or large advisory practice commonly lands at $50K–$150K+ — a premium driven mostly by overhead and brand rather than depth of review. Here’s how those numbers break down and what actually moves them.
The three scope tiers of technology due diligence
Nearly every engagement a buyer encounters maps to one of three scope tiers. Knowing which tier your deal needs is the single biggest lever on price — and a good provider will tell you when the smaller tier is enough rather than defaulting to the largest.
| Scope tier | What it covers | Typical timeline | Typical 2026 fee range |
|---|---|---|---|
| Red-flag review | Deal-breakers only: severe codebase or security exposures, key-person concentration, AI claims that don't survive first contact | Days | $10K–$35K |
| Standard assessment | Full review across codebase quality, infrastructure and scalability, security, technical debt, AI readiness, and the engineering team | 1–2 weeks | $35K–$95K |
| Comprehensive platform diligence | Everything in a standard assessment plus full remediation costing, scalability modeled against the thesis, and IC-ready presentation | 2–3+ weeks | $60K–$150K+ |
The tiers are not quality grades — they’re depth grades. A red-flag review on a $10M add-on can be exactly the right purchase; a red-flag review on a $200M platform acquisition is a false economy.
How much does technology due diligence cost in 2026?
Within those tiers, the number you’re quoted depends heavily on who you ask. The market splits into two broad camps: boutique specialist firms, and the Big Four alongside other large advisory practices. Both will hand you a report; what differs is who wrote it and what you paid for.
| Provider type | Typical fee, full assessment | Who does the work | What you're paying for |
|---|---|---|---|
| Boutique specialist | $35K–$95K | Senior engineers who read the code directly | Depth of technical review; findings from the people who did the work |
| Big Four / large advisory | $50K–$150K+ | Leveraged teams, partner review at the top | Process rigor and a brand LPs recognize — with overhead priced in |
The counterintuitive part is that the lower band often buys the deeper review. Boutique specialists carry less overhead and staff engagements with senior engineers, so more of the fee converts into someone actually reading the code, the cloud configuration, and the commit history — rather than into a pyramid of juniors summarizing management interviews. Our own technology due diligence practice works this way: a fixed fee scoped to deal size, quoted before any work begins. We’ve written separately about how to choose a technology due diligence firm — including the questions that expose who will actually do the work.
The five cost drivers
Two deals that sound identical in a teaser can differ by 3x in diligence cost. Five factors explain most of that spread:
1. Deal size and complexity. Diligence depth should scale with what’s at stake. A platform acquisition whose thesis depends on the technology justifies — and requires — more scope than a tuck-in whose value is a customer list.
2. Codebase and system count. One product on one repository is the base case. Multiple products, an acquired-and-never-integrated second stack, or a sprawl of internal systems each add review surface, and the fee grows with it.
3. AI claims requiring verification. In 2026, “is this an AI company or a company with an AI slide?” is a diligence question in its own right. Verifying model architecture, evaluation discipline, and whether the claimed data moat exists takes senior time that a checkbox review doesn’t include.
4. Timeline compression. Diligence runs on the deal’s calendar, not the reviewer’s. Compressing two weeks of work into five days means parallel staffing and nights, and it carries a rush premium at most firms.
5. Depth of remediation costing. Saying “the codebase has debt” is cheap. Quantifying what it costs in dollars and months to fix — numbers you can put in the model and, when warranted, into the price — is the expensive, senior-judgment part of the work, and the part that pays for the report.
What should a technology due diligence report include?
Whatever you pay, the report should cover six dimensions: codebase quality and maintainability, infrastructure and scalability, security posture, technical debt and architecture, AI readiness and differentiation, and the engineering team with its key-person risk. Anything that skips security or the team is a code review, not diligence.
Just as important is the format of each finding. The output an investment committee can act on carries three things per finding: the risk (what specifically is wrong, in plain terms), its materiality (deal-breaker, priced-in, or noise), and its remediation cost (a quantified estimate in money and time, ready for the model). A report a partner who doesn’t write code can’t act on has failed at its job, no matter how thorough the appendix. We publish our full technology due diligence framework openly — the six dimensions, the inputs each requires, and the finding each produces — so you can hold any provider’s report, including ours, against it.
Is technology due diligence worth the cost?
Run the arithmetic against the deal, not against the invoice. On a $50 million acquisition, a $50,000 technology diligence engagement is one tenth of one percent of the purchase price. Against that fee sits the downside it exists to catch: a platform that can’t absorb the add-ons the thesis assumes, a re-architecture bill discovered in year two, an “AI company” that turns out to be a thin wrapper on someone else’s model, or a departure of the one engineer who understood the system. Any one of those routinely costs more than every diligence report a fund will buy in a decade.
The core math: technology due diligence is denominated in tens of thousands of dollars. The failures it exists to catch are denominated in millions — and they surface in year two, when the price is no longer negotiable.
There’s also an upside case that gets less attention: diligence findings are negotiating leverage. Quantified remediation costs move purchase prices, fund escrows, and reshape earn-outs. A report that documents $2M of required platform work has a way of paying for itself before the ink is dry.