Net Monthly Salary Calculator

Calculate how much you will take home each month, including the effect of extra payments, from your annual gross salary.

When should you use this calculator?

This calculator estimates how much you will actually take home each month, unlike other income tax calculators that only show the annual withholding. Here you will see the difference between a normal month and a month with an extra payment, depending on whether you receive 12 or 14 payments a year.

How it is calculated

Net salary is obtained by subtracting from the annual gross the employee's Social Security contribution (6.5%) and income tax withholding calculated progressively by bracket, just like in the income tax calculator. With 14 payments, that annual net is split into 14 equal parts: 12 ordinary monthly payments plus 2 extra payments, usually in June and December, when you receive double a normal monthly payment. With 12 payments, the amount of those 2 extra payments is prorated (spread) across the 12 months of the year, so each monthly payslip is somewhat higher but without the spikes in June and December.

Practical example

A numeric example: with a gross salary of €30,000/year in Madrid, single with no children, the Social Security contribution is €1,950 (6.5%) and the income tax withholding is €4,644.68, leaving an annual net salary of €23,405.32. Receiving 14 payments, this means €1,671.81 in a normal month and €3,343.62 in the extra-payment months (June and December). Receiving 12 payments, the same gross and annual net salary is spread into equal instalments of €1,950.44 each month, with no double-payment months.

Differences by autonomous community

Net salary for the same gross salary can vary depending on the autonomous community of residence, because income tax has a national bracket (the same across Spain) and a regional bracket, which each community sets independently. This means two people with the same gross salary and the same family situation can have a different monthly net simply by living in different communities, since the income tax withholding applied is not the same.

Common mistakes

A very common mistake is calculating monthly net salary by simply dividing the annual gross by 12, without subtracting the Social Security contribution or income tax withholding: the real result is always lower than that simple division. Another frequent mistake when comparing job offers is looking only at the annual gross salary without asking about the number of payments: two offers with the same annual gross give the same total annual net, but spread that money very differently month to month depending on whether they pay 12 or 14 instalments, which affects monthly budget planning.

Legal and tax context

Prorating extra payments means dividing the amount of the two extra payments across the 12 monthly payments of the year, so that each monthly payslip includes a proportional part of those payments, instead of receiving them all at once in the months they correspond to. The usual dates for extra payments are June (summer bonus) and December (Christmas bonus), although each sector's or company's collective agreement may set different dates, or even spread the extra payment across more than two instalments a year.

Practical tips

When comparing job offers, always ask for the annual gross salary and the number of payments, not just an "approximate net" figure that may not reflect your real family situation (children, disability, marital status) or your autonomous community of residence. If your personal situation changes during the year, updating form 145 at your employer lets you adjust the income tax withholding applied on each payslip, instead of waiting for the annual return to correct the difference.

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Frequently asked questions

What is the difference between 12 and 14 payments?

With 14 payments you receive 12 ordinary monthly payments plus 2 extra payments (usually in June and December), so you earn double in those months. With 12 payments, the amount of those 2 extra payments is spread (prorated) across the 12 months, so you earn a bit more each month but without spikes in summer and Christmas.

When are extra payments received?

Usually in June (summer bonus) and December (Christmas bonus), although each sector's or company's collective agreement may set different dates.

Why isn't the net monthly salary simply gross divided by 12?

Because you must subtract the employee's Social Security contribution (6.5% of gross) and income tax withholding, which varies depending on total salary, autonomous community of residence and family situation (children, disability, joint filing).

What does prorating extra payments mean?

It means spreading the amount of the 2 extra payments across the 12 monthly payments of the year, instead of receiving them in full in the months they correspond to. This way the employee earns a more uniform amount each month.

Why can net salary vary depending on the autonomous community?

Because income tax has a national bracket (the same across Spain) and a regional bracket, which each community sets independently. Two people with the same gross salary and the same family situation can have a different net depending on where they live.

How do I compare two job offers with a different number of payments?

Always look at the total annual gross salary, not the amount of each individual payment: two offers with the same annual gross give the same total annual net, even though they spread it differently across 12 or 14 payments during the year.

Can a company spread the extra payment across more than two instalments?

Yes, if the collective agreement or contract provides for it. June and December are the usual dates, but some agreements spread the extra payment across more instalments or different dates.

How do I update my income tax withholding if my family situation changes?

By submitting an updated form 145 to your employer, reporting the change (a child is born, marriage, a recognized disability), so they adjust the withholding applied on each payslip without waiting for the annual tax return.

Is the Social Security contribution the same for all employees?

The 6.5% employee contribution is the general rate under the General Regime (common contingencies, unemployment, vocational training and the Intergenerational Equity Mechanism). Other regimes, such as the self-employed regime, have different contribution rates and bases.

What happens to net salary if I only work part of the year?

If you only work part of the year, the annual gross used for withholding purposes is usually projected to a full year, which can mean the withholding applied monthly doesn't exactly match what would result from declaring only the months worked; the difference is settled in the annual tax return.