How School Places Are Decided: Catchment, Siblings, and Faith Forms

When we were choosing a primary, I could not understand why one family down the road was confident of a place at the school we were nervous about. It turned out they had an older child already there, and sibling priority put them near the front of the queue. Understanding how schools decide who gets in takes a lot of the mystery, and some of the anxiety, out of the process. Here is how it works.

Oversubscription Criteria

Every school has a published set of oversubscription criteria: the rules it uses to decide who gets a place when more children apply than there are places. If a school is undersubscribed, everyone who applies gets in. It is only when demand exceeds supply that these criteria come into play, ranking applicants in order of priority. The specific criteria and their order vary from school to school, so you must read the admissions policy of each school you are interested in.

The Common Criteria

While the details differ, most schools use a version of the following, roughly in this order of priority:

• Looked-after and previously looked-after children are almost always given the highest priority by law
• Children with an EHCP naming the school are admitted, handled through a separate process
• Medical or social need, where there is a compelling, evidenced reason a child needs that particular school
• Siblings already at the school, which is why sibling priority is such a strong factor for many families
• Distance or catchment, giving priority to children living closest to the school or within a defined catchment area

Catchment and Distance

Catchment areas and distance rules cause the most confusion. Some schools have a defined catchment area; others simply prioritise by straight-line distance from home to school. Either way, the crucial point is that these boundaries are not fixed forever. In a year with many applicants, the effective catchment can shrink, so living just inside last year's boundary is no guarantee this year. Councils and schools can often tell you how far places were offered in recent years, which is a far better guide than assumptions.

Faith Schools and Supplementary Forms

Faith schools may give priority based on religious criteria, such as attendance at a particular place of worship, usually assessed through a supplementary information form (SIF) completed in addition to the main council application. If you are applying to a faith school on faith grounds, you almost always need to complete this extra form by its deadline, and failing to do so can mean being considered under lower-priority criteria. Read the school's policy carefully, as requirements vary widely between faith schools.

Tie-Breakers

When two children are otherwise equally ranked, for example the same distance from a school, a tie-breaker decides. This is often the shortest distance measured precisely, and increasingly some schools use a random allocation, a lottery, as the final tie-breaker. The policy will state which. It can feel arbitrary at the margins, because at that point it genuinely is designed to be fair rather than personal.

Reading the Rules That Apply to You

Because criteria vary so much, the single most useful thing you can do is read the specific admissions policy of each school on your list, and check your council's guidance and gov.uk for the overall framework. Do not assume one school works like another, even next door.

Keeping the Forms and Deadlines Straight

Applying well often means juggling the main application plus supplementary faith forms and evidence, each with its own deadline. My School Agent can pull those admissions emails and reminders into a daily briefing and shared calendar, so a supplementary form or evidence deadline does not slip and cost you priority. Understanding the criteria, and getting every required form in on time, is most of the battle.