---
title: "Rent or own your business software: ownership, accounts | C-Esium"
description: "SaaS or owned software: written assignment of code rights, questions for your accountant, what you keep when you switch and what counts if you sell the company."
url: https://c-esium.com/en/guides/rent-or-own-your-business-software/
---

Guide

# Should you rent or own your business software? Code ownership, accounting, value

Renting software (SaaS) gives you a right to use it for as long as you pay; owning it requires a written assignment of the rights to the code, and leaves you free to evolve it with whoever you choose. The accounting treatment, expense or asset, depends on the rules that apply to your company and is decided with your accountant. At the end of the project, C-Esium assigns to you all rights to the project code, together with the database and the documentation.

By [Noé Fantino](https://c-esium.com/en/about/), founder at C-Esium · Updated 6 October 2026 · 6 min read

The vocabulary is misleading: you “buy” a subscription, and you “have software built” without always holding the rights to it. This guide separates what is a matter of law, of accounting and of strategy. It does not replace your lawyer or your accountant: it helps you ask them the right questions.

## Renting or owning: what is the practical difference?

|  | Renting (SaaS, licence) | Owning (software built for you) |
| --- | --- | --- |
| What you pay | A subscription, often per user per month | A build, then hosting and maintenance |
| What you hold | A right to use it for the term of the contract | The project code (rights assigned), your data, the documentation |
| Changes | According to the vendor’s roadmap | According to your priorities |
| If you leave | You get your data back, not the software | You keep the software |
| In your accounts | An expense as you go | Expense or asset: to decide with your accountant |
| Main risk | Dependence on the vendor, price increases | Success of the project, quality of maintenance |

## What does “owning” software mean?

Paying for a development is not, in itself, enough to own it. What you own is what the contract assigns to you. How rights must be assigned, and what the contract must say, depends on the law that governs it: have the clause reviewed by your lawyer.

Custom software is never written from scratch. It relies on **generic building blocks**: languages, open-source frameworks and libraries, a database, hosting services, third-party APIs for SMS or AI. Only the standard open-source libraries the code relies on (React, Node.js…) remain under their original licence, as in any software. Third-party services, such as SMS or AI APIs, are still paid for as you use them.

What can be assigned to you is the **project code** written for your company, with the data model and the documentation. At C-Esium, that means all of the project code, including the in-house building blocks we reuse from one project to the next.

In the contract, check:

1.  the list of rights assigned (reproduction, modification, adaptation, exploitation), their duration and their territory;
2.  the moment of transfer (on delivery, on payment of each batch);
3.  the actual handover of the source code and the documentation, not only rights on paper;
4.  the list of third-party building blocks and their licences;
5.  what happens for future developments.

## How do you account for custom software?

The answer depends on the accounting standards that apply to your company, and on your contract. Do not decide it alone, and do not let a provider decide it for you: put these questions to your accountant before you sign.

| Question for your accountant | Why it matters |
| --- | --- |
| Can the build be recorded as an asset, or is it an expense? | It changes how the cost appears in your accounts over the years |
| How are the assessment and scoping treated? | They come before the build and may not be treated the same way |
| How are training and change management treated? | They concern your organisation more than the software itself |
| If the software is delivered in batches, from when is each batch counted? | A complete software is delivered in batches, over 6 months to more than a year |
| How is a SaaS subscription treated, including its set-up costs? | To compare both options on the same basis |
| How are later developments treated? | Some extend the software, others only keep it running |

In a C-Esium project, the assessment and scoping come before the build, and training and change management concern your organisation. Show your accountant how the quote is split, so that each item can be classified. C-Esium does not decide the accounting treatment, and never promises a tax or balance-sheet effect.

## What happens the day you want to switch?

With SaaS, check in your contract how you export your data, in which format and at what cost. Rules are moving in some places. In the European Union, the Data Act, applicable since 12 September 2025, requires providers to make switching easier, with open interfaces and data export in a commonly used, machine-readable format; switching charges, including data egress, disappear from 12 January 2027 ([European Commission, “Data Act explained”](https://digital-strategy.ec.europa.eu/en/factpages/data-act-explained), accessed 4 October 2026).

It is real progress, with a limit: data protected by the provider’s intellectual property or trade secrets is excluded. You get your data back, not the software or the business logic built into it: that has to be rebuilt elsewhere.

With software you own, the question changes. You keep the code, the data and the documentation, and you can hand the next steps to another provider or an in-house team. That still requires up-to-date documentation and real access to the code and the hosting. At C-Esium, the code is placed in a Git repository (GitHub or GitLab) in the client’s name, at the latest on delivery. By default, the hosting account is opened and paid for by C-Esium, then re-invoiced to the client; it can be opened in or transferred to your name at any time, on request.

## And if you sell the company?

During a sale, the buyer and its advisers may look closely at the contracts and tools the business depends on. Some points to prepare, with no promise of valuation:

-   **Ownership**: a written assignment of rights removes any doubt about who holds the software.
-   **Documentation**: a documented tool does not depend on a single person.
-   **SaaS contracts**: check their commitment period, their price-revision clauses and what they say about a change of control.
-   **The balance sheet**: if the software is recorded as an asset, its book value is not its market value.

The value a buyer will place on your tool depends on its usefulness, its quality and the valuation method used. Nobody can guarantee it in advance.

## What C-Esium transfers to you

The client owns its software: C-Esium assigns to it by contract all rights to the project code — including the building blocks we reuse from one project to the next — together with the database and the documentation. No per-user licence, no dependence on a software vendor.

In practice, at the end of the project you receive:

-   the **project source code** written for your company, in a Git repository in your name;
-   the **database**;
-   the **technical and functional documentation**.

You can evolve the software with C-Esium, with another provider or in-house. Maintenance is optional, as a monthly package. The same rules apply to a focused project, from AED 40,000 excluding VAT (€10,000 in France): you own its code too. The full offer is on the [custom internal software](https://c-esium.com/en/custom-business-software/) page.

## When is renting the better option?

Renting is more reasonable if your processes are standard, your team is small, your need is immediate, or if nobody in-house can lead a project. It is also the right choice for highly standardised functions such as accounting or payroll, which custom software connects to rather than replaces. To price both options, read [how much does custom business software cost](https://c-esium.com/en/guides/how-much-does-custom-business-software-cost/) and [custom software or ERP](https://c-esium.com/en/guides/custom-software-or-erp/).

## Sources

-   [European Commission, “Data Act explained”](https://digital-strategy.ec.europa.eu/en/factpages/data-act-explained), accessed 4 October 2026.

## Frequently asked questions

### If I pay for software to be developed, do I automatically own it?

Not necessarily. What you own is what the contract assigns to you: the rights assigned, their duration and their territory should be written down, and the source code and documentation actually handed over. Have the clause checked by your lawyer under the law that governs your contract.

### Can custom software be recorded as an asset in our accounts?

That depends on the accounting standards that apply to your company and on how the project is contracted. Decide the treatment with your accountant before the project starts, including how the assessment, the training and successive batches are handled. C-Esium makes no promise about the accounting or tax effect.

### Does owning your software increase the value of the company?

Nobody can guarantee it. Owned, documented software whose ownership is written into the contract answers in advance questions raised during a sale, but its value to a buyer depends on its real usefulness, its quality and the valuation method used. C-Esium promises no valuation.

### What does C-Esium transfer at the end of the project?

C-Esium assigns to the client by contract all rights to the project code, including the building blocks we reuse from one project to the next, together with the database and the documentation. There is no per-user licence and no dependence on a software vendor: you can evolve the software with C-Esium, with another provider or in-house.

## Read next

[### How much does custom business software cost in 2026?

Custom business software prices in 2026: C-Esium budgets from AED 40,000 and AED 200,000, cost drivers, milestone payments and a 5-year SaaS comparison.

Read](https://c-esium.com/en/guides/how-much-does-custom-business-software-cost/)[### Custom software or an off-the-shelf ERP (Odoo, Sage…): how do you choose?

Custom software or an off-the-shelf ERP such as Odoo, Sage or Business Central? A 9-criteria decision grid, real ERP strengths, the hybrid option and Tech-O.

Read](https://c-esium.com/en/guides/custom-software-or-erp/)[### Custom internal software: offer and pricing

What you get, what it costs, what you own.

Read](https://c-esium.com/en/custom-business-software/)

## Your software, built for your company.

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[Book a call](https://c-esium.com/en/contact/)[contact@c-esium.com](mailto:contact@c-esium.com)