Personal Income Tax (IRPF) with two employers: why your tax return may result in additional tax payable
What really happens when you have more than one employer
Every spring, the same phrase comes up: “If you have two employers, the Tax Agency will come after you.”
It is one of the most widespread myths about Personal Income Tax (IRPF) and the income tax return. Although it is based on a real experience (many people do end up owing tax when filing their return), the usual explanation is incorrect.
The reality is much simpler: having more than one employer does not mean paying more IRPF. What does happen is that the likelihood increases that less tax than required has been withheld during the year, and that adjustment then appears in the tax return.
IRPF does not depend on the number of employers
Personal Income Tax (IRPF) is a personal and progressive tax calculated based on three main elements: the total annual income, your personal and family circumstances (allowances, children, disability, etc.), and tax deductions.
Therefore, the final result does not change whether income comes from one or several companies. Two people with the same income and circumstances should pay practically the same amount, regardless of the number of employers.
The difference lies in how IRPF withholdings are applied throughout the year.
Why does having more than one employer often result in tax payable?
Each employer calculates withholding as if it were the only employer. In other words, each company applies the corresponding percentage only to the salary it pays, without considering the employee’s other income.
As a result, in many cases, the total amount withheld is lower than what would apply if the entire salary came from a single employer. This effect is more noticeable when the second income is relatively low, since the withholding is usually minimal.
When the tax return is filed, the Tax Agency does not penalise taxpayers for having two employers. Instead, it calculates the actual tax due on the total income and deducts the amount already withheld. If less tax than required has been withheld during the year, the difference is regularised and the result is additional tax payable.
A practical example and why the tax return may result in tax payable
An employee earning €24,000 per year may encounter two different situations. With a single employer, the withholding is usually well adjusted and the tax return result tends to be balanced. However, if that income is split between two employers (for example, €18,000 and €6,000), each employer applies its own withholding rate. Since the second amount is low, the withholding applied is usually reduced.
The result is not that more tax has been paid, but rather that less tax has been paid during the year, and the adjustment is made later.
This is where the real misunderstanding arises. Many people believe that IRPF increases simply because they have two employers, when in reality the only thing that changes is how the withholdings are distributed. With a single employer, the company calculates withholding based on the full annual salary, so the percentage applied is generally fairly accurate. With two employers, however, each calculates withholding independently, without considering the annual total, which frequently leads to insufficient withholding throughout the year.
For this reason, the outcome of the tax return does not depend on the number of employers, but on the level of withholding applied during the tax year.
When does the obligation to file a tax return matter?
In addition to the effect on withholdings, there is another factor that often causes confusion: the obligation to file a tax return.
In certain cases, having more than one employer may lower the income threshold above which filing a return becomes mandatory, especially when the second employer exceeds certain limits.
This may lead to a common situation: a person who would not be required to file a tax return with one employer may have to do so when they have two employers.
If, in addition, the result of the return is tax payable, it is easy to attribute this to the number of employers, when in reality it is simply a tax adjustment.
However, this is not the case. The number of employers does not alter the tax itself; rather, when filing the return, the actual IRPF due is regularised and the adjustment resulting from insufficient withholding during the year becomes visible.
Situations in which this occurs most frequently
These are the scenarios in which the issue most commonly arises:
- Change of employer during the year
- Consecutive temporary contracts
- Receiving unemployment benefits from the SEPE and returning to work
- Temporary redundancy schemes (ERTE)
- Long-term sick leave
- Multiple employment situations (two companies in the same year)
In all these cases, the pattern is usually the same: low or incorrectly adjusted withholdings.
How to avoid surprises
The solution is not to avoid having multiple employers, but to anticipate the situation.
Some practical recommendations:
- Review payslips when changing employer or starting with a second employer.
- Voluntarily request a higher withholding rate if annual salary levels justify it.
- In the case of SEPE benefits, consider requesting withholding (where applicable) or setting aside an amount.
- Make an estimate halfway through the year.
The income tax return is not a punishment, but a final adjustment. Ideally, that adjustment should be kept as small as possible.
Related content
