Bizum and the Treasury: 3 surprising cases in which it must be declared

Self-employed individuals and taxpayers who receive earnings through Bizum must declare them; sporadic payments without profit are not subject to this obligation. This is derived from the information published on September 9, 2026, which distinguishes between an everyday transfer and an income linked to an economic activity.

The situation is easy to imagine: a person pays for a product, receives money for a rental, or charges for a service via mobile. The movement seems immediate and informal, but the origin of the money remains the decisive criterion. And this is where doubts may arise.

When does a Bizum become taxable income?

Why does it especially affect the self-employed?

For a self-employed person, the Bizum received for a service or the sale of a product is part of the professional activity. Therefore, the collection must be included as income from economic activities in the Income Tax return.

The payment method does not change the nature of the income. Whether the client pays by card, transfer, or Bizum, the money remains linked to the service provided or the product delivered. The mobile is only the channel; the taxable event is the professional collection.

The obligation falls on the self-employed person who receives the money. The consumer making the payment is not subject to the same requirement simply because they used Bizum. In some cases, however, they may apply the payment to deduct certain expenses, depending on their situation.

What about everyday payments?

Sporadic movements that do not represent a professional activity or obtain profit are not included in the explained case. This allows separating a one-time payment between individuals from a collection that is part of an economic activity.

The distinction does not depend on the number of movements, but rather on the reason the money is received. A Bizum between individuals to reimburse an everyday expense is not the same as a charge for an order, a product, or a service.

The key is to keep a clear explanation for each income. When the same app concentrates personal and professional movements, classification becomes complicated and the risk of including incorrect data in the declaration increases.

Which taxpayers must declare Earnings?

Do garage and storage room rentals pay taxes?

Taxpayers who obtain money from renting a garage or storage room must declare it if the operation represents a profit. In this case, the income must be included as income from real estate capital in the Income Tax return.

The fact of collecting through Bizum does not by itself turn the payment into income. What matters is that the money comes from an activity that generates profitability. Therefore, the digital channel does not eliminate the obligation associated with the rental.

This case may affect people who do not have a professional activity nor are registered with Social Security for this activity. The source precisely differentiates these incomes from collections typical of a self-employed person.

When does a second-hand sale create an obligation?

A second-hand sale only falls under the indicated case when the asset is transferred for a price higher than the purchase price. In this case, the gain must be included in the section on capital gains and losses derived from the transfer of other capital assets.

Most of these sales do not necessarily imply a profit because objects are often sold below the original price. However, when the final price is higher, the operation has a tax consequence that does not disappear because the buyer paid via Bizum.

The table allows seeing the criterion without confusion: it is not Bizum that determines taxation, but the activity or the gain behind it. This is the most useful reading for any taxpayer receiving money by mobile.

How to avoid errors when declaring Bizums

Is it advisable to separate personal and professional Bizum?

Yes. The recommended advice is to use two separate Bizum accounts, one personal and one professional. This separation makes it easier to identify which incomes correspond to an economic activity and which are part of daily life.

The measure does not change the nature of the money nor substitute the corresponding declaration. It serves to organize the information and reduce the possibility of mixing personal payments with professional collections.

When all movements appear in the same account, the taxpayer may have difficulties distinguishing them. A confusing classification can cause errors in the declaration, and any incorrect data may be reviewed by the Tax Agency.

What steps can the taxpayer follow?

The source does not set a specific deadline to present these incomes nor lists concrete mandatory documentation. Therefore, the taxpayer should limit themselves to the criteria and sections corresponding to the real origin of the money.

1. Separate personal collections from professional ones, especially if regularly received via Bizum.
2. Identify whether each income corresponds to a service, the sale of a product, a rental, or a transfer with profit.
3. Include professional collections as income from economic activities.
4. Declare incomes from a garage or storage room as income from real estate capital when they generate profit.
5. Include a second-hand sale in the capital gains and losses section when the sale price exceeds the purchase price.
6. Check that sporadic operations without profit are not mixed with incomes that do have an economic nature.

What specific documentation must be kept?

The source content does not detail any list of required receipts. This limitation must be clear: it cannot be stated that it is necessary to provide specific receipts, invoices, or statements if the available information does not specify it.

• The source does not specify mandatory documentation.
• The separation between personal and professional accounts appears as a practical recommendation.
• Information from each collection must allow its origin to be distinguished when preparing the declaration.

The most common errors arise from three confusions. The first is thinking that no Bizum has tax effects; the second, considering that any payment between individuals is professional income; the third, mixing business money with that of personal use.

It is also advisable not to confuse payment with gain. A second-hand sale is not included just because it was paid by Bizum, but when the transfer price is higher than the purchase price. In rentals, the criterion is that the activity generates profitability.

The source also does not point out a specific deadline for these cases. Therefore, the practical reminder is to prepare the declaration within the corresponding general term, without inventing a specific deadline for Bizums.

The reality is that an instant payment does not lose its economic nature because it circulates via mobile. Self-employed and taxpayers with earnings must correctly classify incomes, separate personal and professional uses, and avoid incorrect data in the Income Tax; sporadic operations without profit are outside the explained case, but errors can be reviewed by the Tax Agency.