September Divorces: Why They Spike After the Summer and What Evidence You Need

Spanish family courts record the same pattern every year: September and January concentrate the largest volume of divorce petitions and applications to vary custody and maintenance arrangements. It is not a coincidence or a statistical curiosity: it reflects a very specific dynamic we see repeated in the cases that reach us in Granada and Málaga.

This article explains why it happens, what is actually decided in family proceedings and, above all, what kind of evidence the court accepts when what one party claims does not match what the other maintains.

Why divorce is decided in September

The explanation is not that couples break up in August. It is that the summer accelerates a decision that had already been made:

• More time together, less routine. Holidays strip away the schedules and obligations that cushion daily life during the year. What was latent becomes obvious.
• The school calendar. Many couples with children postpone the break-up so as not to disrupt the school year. September marks the start of the next one and, with it, the least bad moment to reorganise family life.
• The first summer with a contact arrangement in force. In families that have already separated, August is when it becomes clear whether the agreement works: missed handovers, undisclosed trips, holiday periods that are not respected. September is when that reaches the court.
• Professional availability. Law firms and courts resume activity, and proceedings prepared in July are filed now.

What is actually decided in family proceedings

The divorce itself is not in dispute: since the 2005 reform it is enough for one party to request it. What is litigated, and where the outcome is decided, are the arrangements:

• Custody and contact, including whether shared custody is appropriate.
• Child maintenance, the amount of which depends on each parent's real income and the time the children spend with them.
• Spousal maintenance, which is terminated if the recipient enters into a new stable marital cohabitation (article 101 of the Civil Code).
• Use of the family home and the winding up of the matrimonial property regime.

In all four, the judge's decision rests on facts: where each party lives, with whom, what they actually earn and how the existing agreement is being complied with. When the two parties describe different realities, the court needs more than statements.

The four situations we see most in September

1. Breaches of the contact arrangement over the summer

Systematically late handovers, holiday periods extended without agreement, trips abroad with the child that were never notified, or a parent who does not exercise the contact they fought for. Documenting the pattern, not an isolated incident, is what supports an application to vary the arrangement. More detail in evidence for shared custody and in our guide to the detective report in a custody hearing.

2. New cohabitation by the recipient of maintenance

This is the case that grows most after the summer, and also the most misunderstood: it is not enough for the ex-partner to have a new relationship. What terminates spousal maintenance is stable, open marital cohabitation, and that is proven through a sustained pattern of overnight stays, use of the home and shared life. We explain it in detail in cohabitation verification, with its equivalent for Málaga and the Costa del Sol.

3. Real income that does not match what was declared

Undeclared economic activity, a lifestyle incompatible with the payslips filed in the proceedings, or assets held in third parties' names. This is decisive both for setting child maintenance and for dividing joint assets: see financial and asset investigations.

4. Infidelity discovered over the summer

To be clear: in Spain infidelity has no direct legal consequences in a divorce, nor does it influence custody on its own. It can be relevant when it reveals something else: cohabitation that affects maintenance, joint money spent on a third party, or an environment that affects the child. See infidelity investigations in Granada.

What evidence the court accepts (and what collapses)

This is the part that causes the most confusion, and the part worth being clear about before acting:

• Accepted: the report of a private detective holding a TIP licence, with its photographic record and the professional's ratification in court. Observation is carried out from publicly accessible places and documents conduct, not private life inside the home.
• Not accepted, and exposes you to liability: fitting a GPS tracker to the other party's car, accessing their phone, email or social accounts, recording inside their home, or hiring an unlicensed third party. Such evidence is void and may constitute a criminal offence.
• Grey area: social media screenshots and messages from third parties. They serve as an indication and help direct the investigation, but rarely sustain an application on their own.

For the full legal framework, see rights and obligations of the private detective in Spain.

Frequently asked questions

How far in advance of the hearing should the investigation be commissioned?

As early as possible, and at least three or four weeks. Proving a pattern rather than a one-off requires several days of work spread over time, and the report needs to be finished with enough margin for your solicitor to file it.

Can the judge reject the detective's report?

The judge weighs it freely, as with any evidence, but cannot reject it because of its origin if it was obtained within Law 5/2014 and a legitimate interest is established, and in family proceedings where arrangements are in dispute that interest exists.

Do you work with the solicitor or directly with the client?

Both. Where a solicitor is already handling the matter, we agree with them which facts need proving so the investigation targets what will actually be argued in court: see support for solicitors. If you do not yet have a solicitor, we can put you in touch with trusted family law firms in Granada and Málaga.

How much does it cost?

Surveillance starts at €400 per day and most family cases are resolved for between €800 and €2,000. Every case receives a fixed quote after the first consultation, which is free. Full breakdown in how much a private detective costs.