The Importance of Invoices
7 Octubre, 2026
Sound accounting starts with rigorous invoice management. Businesses are often not fully aware of how important it is to provide their professional advisers with all the relevant documentation. However, an accountant can only record transactions of which they are aware and for which they have received the appropriate supporting documents. Accordingly, the first step towards maintaining accurate, orderly and reliable accounting records depends on the company itself being actively involved in organising and providing all its invoices.
An overlooked invoice also comes at a cost
Proper document management is essential. All too often, it does not receive the attention it deserves and, as a result, businesses may end up losing money without even realising it.
Every invoice that goes unrecorded may result in a financial cost for the company, even if the impact is not immediately apparent. One misplaced invoice today, another overlooked tomorrow... by the end of the quarter or financial year, the cumulative impact can be considerable.
The issue is not limited to input VAT that can no longer be deducted. When an invoice is not recorded as an expense, the company's accounting and taxable profits are artificially increased, potentially resulting in a higher Corporate Income Tax liability than would otherwise have been due.
A simple example: €1,000 in unrecorded invoices
Let us consider a simple example.
If a company fails to record invoices with a taxable amount of €1,000, relating to tax-deductible expenses subject to the standard VAT rate of 21%, it will lose the opportunity to deduct €210 of input VAT on its VAT return (Form 303).
Furthermore, if the company is subject to the standard 25% Corporate Income Tax rate, failure to record the expense will result in a higher taxable profit, leading to approximately €250 of additional Corporate Income Tax on its annual return (Form 200).
In this scenario, the omission would therefore result in an additional cost of €460.
Although this example is based on a relatively modest amount, situations of this kind occur frequently in many businesses. The accumulation of small unrecorded invoices can have a very significant financial impact over the course of a financial year.
What may initially appear to be a minor administrative oversight can ultimately have a direct impact on the profitability of the business. Any additional tax paid as a result of failing to record expenses correctly is money that the company can no longer allocate to investment, innovation, growth or improvements to its operations.
Ultimately, minor documentary omissions can turn into major missed opportunities.
How can businesses prevent invoices from being left out of their accounting records?
Poor invoice management not only leads to disorganised accounting records but can also have a direct impact on a company's profitability. The good news is that this problem can be avoided by implementing a number of straightforward measures.
Establishing an internal procedure for collecting all invoices, submitting them regularly to the company's professional advisers and keeping them properly organised is the first step.
Digitising documentation, using document management tools or invoicing software, and appointing a person responsible for overseeing invoice management can all help minimise errors and prevent information from being lost.
Regularly reviewing the documentation and maintaining effective communication with the company's professional advisers also makes it possible to identify issues at an early stage and ensure that all deductible expenses and taxes are properly reflected in the accounting records.
Sound accounting is built day by day
The best accounting is not accounting that has to be corrected at the end of the financial year, but accounting that is built day by day on complete, properly organised documentation submitted on time.
Effective collaboration between a company and its professional advisers provides the best safeguard against unnecessary costs and helps optimise the management of the business.
Anaïs Pineda – Accounting Department
