Investment due diligence: what investors check and how to prepare

Investors check the cash, the revenue and the records behind them. We get the books, filings, cap table and forecast ready before they ask.

Investment due diligence is the review an investor's advisers carry out before money changes hands. For a startup, the financial checks focus on cash burn and runway, revenue growth, revenue recognition, how costs are split, and whether the pitch figures agree with the records.

The documents go into a data room, a secure online folder the investor's advisers work through. Each document that has to be rebuilt during the round adds time to it.

What investors check

Cash cost base and runway
What the company spends each month, and how long the cash will last.
Revenue growth
The rate revenue is growing, from the monthly figures.
Revenue recognition
The policies that decide when revenue counts.
Cost allocation
How costs are split between gross profit and operating expenses.
Numbers that trace back
Whether the figures in the pitch materials agree with the accounting records.
Legal and tax structure
More emphasis on smaller deals, for example how share schemes are set up.

Source: ICAEW Corporate Finance Faculty, Financial Due Diligence, Guideline 71 (2024).

The British Business Bank checklist

The British Business Bank publishes a due diligence checklist. It is written for buying a business, and the bank says it also applies to buying shares in or investing in a company. Its financial strand covers:

  • accounts and cash flow, and profit and loss
  • shareholdings and percentages
  • annual reports
  • debt, collateral and equity
  • payroll, VAT and other tax liabilities
  • projections

Its legal strand covers contracts, insurance, licences, regulatory compliance and litigation, and it also covers operations, assets and intellectual property, employees and marketing.

Data room checklist

A data room usually has these sections (UK Space Agency checklist on GOV.UK):

  • Capital raising: the pitch deck and the terms of the round
  • Financial: statutory and management accounts, forecasts, tax returns and R&D claims
  • Legal and intellectual property: articles, the cap table, intellectual property filings and employment contracts
  • Commercial: customer and supplier contracts and sales information
  • Regulatory: licences and the company's compliance records
  • HR and governance: board minutes and share option plans
  • Technical: the product and how it is built

How to prepare for due diligence

  1. 1
    Bring the books up to date

    Reconcile to a recent month end, so every figure an investor sees agrees with the bank.

  2. 2
    Check the filings

    Accounts, confirmation statements, corporation tax, VAT and PAYE filed and paid, with anything late dealt with first.

  3. 3
    Reconcile the cap table

    Every share issue, transfer and option grant agreeing with the register of members and Companies House.

  4. 4
    Build the forecast

    Monthly cash and profit with the burn and runway shown, and each assumption written down.

  5. 5
    Fill the financial section of the data room

    Name each document clearly and keep it current while the round runs.

Our fees for due diligence preparation

Investor readiness

Quoted before we start
  • Books, filings and share records brought up to date
  • A forecast with its assumptions written down
  • The financial documents investors ask for

Business Pulse set-up

From £750 + VAT, one-off
  • Annual budget and 12-month cash flow forecast
  • The KPIs investors will ask about
  • A planning meeting to agree the assumptions

SEIS and EIS

£499 then £599 + VAT
  • Advance assurance before you pitch
  • The compliance statement after the round
  • A certificate for every investor

Other funding pages

Investor readiness
How we prepare the books, forecast and records before an investor asks for them.
Raising venture capital
The funding stages, what venture capital funds check and the 2025 market.
Raising angel investment
Who angels are, what they invest and how to get a round ready.
Startup valuation and dilution
Pre-money and post-money, a worked dilution example and EMI share valuations.
Term sheets explained
The terms in a UK term sheet and the model documents for Series A.
Private equity investment
How private equity differs from venture capital, and the accounts work in a deal.

Common questions

What is a data room?

A central, secure place for all the company's documents, legal, financial, commercial and regulatory, that investors review before investing (UK Space Agency data room checklist).

Is due diligence an audit?

No. The ICAEW's guideline says financial due diligence is not an audit and gives no assurance opinion.

What do early-stage investors look at first?

Usually the cash: the current cost base and how fast the company is spending, which shows how long the money will last. Revenue growth, how revenue is recognised and how costs are split come next.

Do investors check tax?

Yes. For smaller investments the ICAEW notes more emphasis on legal and tax checks, such as how share schemes are set up. Investors in an SEIS or EIS round will also want to see advance assurance.

What does preparing for due diligence cost?

It depends on how current the books and records are, so we quote after a first look. The Business Pulse set-up, which builds a budget and 12-month cash flow forecast, is from £750 + VAT.

Get ready for due diligence

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