What it means
Most commercial software is sold as a finished product with the code kept private. Open source reverses that: the code is public, and a community of developers and companies contribute improvements.
Well-known examples include operating systems, databases and web servers that run a large share of the internet. The word free needs care.
Open source is usually free of licence fees, but a licence still applies, and some licences require anyone who distributes changes to share them under the same terms. Finance and legal teams should check which licence is in use before building a product on top of the software.
The business case is about total cost rather than purchase price. A company avoids licence fees and vendor lock-in, but it takes on implementation, hosting, security updates and staff or contractor time.
Many firms buy a paid support contract from a company that packages the open source software, which gives them the predictability of a commercial vendor. The accounting treatment follows the cost, not the licence.
Fees for implementation and support are expensed or capitalised according to normal rules, and internal development effort may qualify for capitalisation if it meets the criteria. No special open source category exists in the accounts.
Security and governance deserve a place in the budget. Because anyone can read the code, flaws are often found and fixed quickly, but the company is responsible for applying those fixes, and delays can expose it to cyber risk and possible losses.
Open source also affects valuation. A start-up built on open source may have strong community adoption but limited ability to charge for the code itself, so investors look at whether it sells hosting, support or premium features.
The strategic question is who captures the value when the core product is free.
In practice
Real-world examples.
Example
A marketing agency builds its website on open source content management software. It pays no licence fee, but it pays a developer each month to keep the site secure and updated. That monthly fee is the real running cost of the software.
Example
A software start-up releases its core product as open source to attract users, then sells a paid hosted version with support. Revenue comes from the service, not the code. Investors value the business on recurring subscription income and not on the number of downloads.
Example
A hospital group chooses an open source database for its reporting system and buys a support contract from a specialist firm. Finance records the contract as an annual operating expense and avoids the licence fees charged by the proprietary alternatives.
Formula
Calculation
Three-year total cost of ownership = licence fees + implementation + support + hosting and staff time
A company compares two options for a new system over three years. Proprietary software costs 3 x $40,000 = $120,000 in licences, $20,000 for implementation and 3 x $10,000 = $30,000 for support, so the total = 120,000 + 20,000 + 30,000 = $170,000. Open source software has no licence fee, costs $50,000 to implement, 3 x $15,000 = $45,000 for a paid support contract and 3 x $10,000 = $30,000 for hosting and staff time, so the total = 0 + 50,000 + 45,000 + 30,000 = $125,000. The open source option is cheaper by 170,000 - 125,000 = $45,000 over three years. The gap would narrow or reverse if the company had to hire a specialist full time, so the staff time estimate deserves the most scrutiny.Case study
Seen in the real world.
Sandstone Analytics is a fictional consultancy that was paying $90,000 a year in licences for a reporting tool. The finance director proposed moving to an open source alternative to save the fee.
The migration cost $60,000 in consulting and staff time, and the company added a $20,000 yearly support contract. The saving in the first year was therefore smaller than expected, but from the second year the company saved 90,000 - 20,000 = $70,000 annually.
The illustrative lesson is that open source saves money over time rather than immediately, and the decision should be judged on total cost, not the absence of a licence fee. The finance director now asks every software proposal to include a three-year cost table.
Watch out
Common mistakes.
- Assuming open source means free of cost, when implementation, support, hosting and staff time still have to be paid for.
- Ignoring the licence terms, which can place obligations on companies that modify or distribute the code.
- Overlooking security and maintenance, which become the user's responsibility unless a support contract covers them.
Questions
People also ask.
Is open source software safe to use in a business?
It can be, because many people review the code, but safety depends on how actively it is maintained and how quickly updates are applied.
Can a company make money from open source?
Yes, typically by selling support, hosting, training or enhanced versions rather than the code itself.
Does open source affect financial reporting?
Only through the costs involved, which are treated in the usual way as expenses or capitalised development costs.
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