When to Start Preparing for Aptitude Tests: A Timeline for 2026/27 UK Applications

Ask when to start preparing for aptitude tests and you will get the same vague answer everywhere: "start early." That is true, and it tells you nothing you can act on. What you need is a timeline anchored to the real dates of the 2026/27 UK application cycle: when schemes open, when they realistically fill, and when the test invitation lands in your inbox. From those dates you can work backwards to a plan.

This article lays out that timeline for candidates targeting investment banking, consulting and the Big 4. It is written to be read at any point in the cycle, not only at the start: find the month you are standing in and work from there. The single most important thing it has to tell you is this: the deadline on the employer's website is not your deadline. Almost everything that matters happens earlier.

When do 2026/27 graduate schemes open and close?

Investment banks open first, from midsummer. Bulge-bracket firms typically post London graduate and summer-analyst roles for the 2027 intake from late June through early autumn 2026, and most review applications on a rolling basis: they assess candidates in the order applications arrive and fill seats as they go. Industry trackers report that a large share of investment banking places, commonly estimated at more than half, are effectively filled by November, well before many published deadlines. A scheme "closing in January" can be functionally closed by Halloween.

Consulting and the Big 4 follow from early autumn. These firms generally open applications for 2027 intakes around September–October 2026, with deadlines running from late autumn into winter, division-dependent. Many also assess on a rolling or cohort basis, so the early-application advantage applies here too, just less brutally than in banking.

The test comes almost immediately after you apply. This is the step that catches people. Once you submit an application, the online assessment invitation typically arrives within 24 to 72 hours, with a completion window that is usually 48 to 72 hours and, at some employers, up to seven days. Those figures come from CareerTestPrep, which aggregates candidate reports; no employer publishes its own. There is no comfortable gap between applying and testing. Whatever shape you are in when you press "submit" is the shape you sit the test in.

Put those three facts together. If you intend to apply when schemes open in September, your test preparation has to be substantially done in August. Preparation that starts when the invitation arrives is two months late.

What does a month-by-month preparation timeline look like?

These months describe the shape of a full cycle, not a countdown from the day you happen to read this. If you are joining partway through, start at the month you are in and compress what came before rather than skipping it. The order of the work matters more than the calendar: measure, then aim, then practise under time, then protect the sitting.

July 2026: measure, don't practise. This is the diagnosis month, and it is the one most people skip. Before touching a practice question, establish your baseline: one honest, timed diagnostic of your numerical, verbal and logical reasoning under real test conditions. That one measurement decides the rest: whether you need six weeks of steady work or a fortnight of polish, and which section deserves the time. Do the cheap reconnaissance in the same week: list your target firms, note which assessment provider each uses (SHL, Aon/cut-e, Cappfinity, Arctic Shores, which differ far more than most candidates expect), and register interest on careers pages so opening dates come to you.

August 2026: the core preparation window. This is where the real work belongs, in the quiet before schemes open. If you reach this stage late, it is the month to protect first, ahead of polishing anything else. Careers advice converges on starting focused preparation four to eight weeks before applications open, and August is exactly that window for a September cycle. Work your weakest section first, because improvement there is worth the most percentile movement. Practise timed from day one, since untimed practice trains a skill the test does not measure. By late August you want the formats of your target firms' actual providers to feel familiar, not novel.

September 2026: apply early, in test-ready condition. Submit your strongest applications as close to opening as quality allows. Rolling assessment means the same application is worth more on 15 September than on 15 November. Expect test invitations within days of each submission, and stagger your applications rather than firing off eight in one weekend. Eight assessment windows landing in the same week is how prepared candidates end up sitting tests exhausted.

October and November 2026: the crunch. Deadlines cluster through this stretch, assessment centres begin, and later-stage tests (including re-tests sat under supervision at assessment centres) appear. Preparation now is maintenance: short, regular timed sessions to keep speed sharp, not new ground. If you are starting from here, be realistic. Target the schemes with later deadlines and slower processes, rather than racing rolling-deadline banking applications you cannot catch. Starting late is worth far more than not starting.

December 2026 onward: the long tail. Plenty of strong schemes run deadlines into winter and beyond: consulting cohorts, Big 4 divisions, corporate programmes. Second-round openings appear in the new year as well. The cycle punishes lateness but it does not end in November.

What matters more than the calendar?

Work backwards from the application date, not the deadline. Decide when you will actually submit. For rolling schemes that should be near opening. Then schedule preparation to finish before that date. This one habit puts you ahead of the majority of applicants who anchor on the published deadline.

Know which test you are preparing for. The four providers UK employers use differ far more than most candidates expect, and preparation for one transfers poorly to another. The complete guide to UK graduate aptitude tests is the quickest way to work out which one you are facing.

Diagnose before you drill. Preparation time is finite, especially alongside a final-year workload. The difference between eight weeks spread evenly across everything and eight weeks aimed at a measured weakness is substantial, and you can only aim with a measurement taken before you start.

Protect the test sitting itself. However prepared you are, sit each real assessment rested, in a quiet room, on a proper device, early in your completion window rather than at the deadline at midnight. An avoidable 5% underperformance on test day can cost more than a week of preparation gained.

Start with the measurement

The 2026/27 cycle rewards candidates who are test-ready before schemes open, apply close to opening, and spend the autumn executing rather than cramming. Wherever in that cycle you are reading this, the first step does not change: knowing, honestly, where you stand today.

Before you start preparing, find out where you actually stand. The Acumen Logic Benchmark is a free, one-shot diagnostic: 20 questions under real timed conditions, taken once, like the real thing. Sit it before you start preparing, and you will know exactly what that preparation needs to look like.

Common questions

When should you start preparing for aptitude tests? +

Careers advice converges on four to eight weeks of focused preparation before the schemes you are targeting open. For a September start that means July and August. Investment banks open from midsummer and assess on a rolling basis, so preparation that begins when the invitation arrives is roughly two months late.

How long after applying does the test invitation arrive? +

Usually within 24 to 72 hours of submitting your application, with a completion window that is usually 48 to 72 hours and, at some employers, up to seven days. Those are CareerTestPrep’s aggregated figures, not published employer policy. There is no comfortable gap between applying and testing: whatever shape you are in when you press submit is the shape you sit the test in.

Is it too late to start preparing in October? +

No, but be realistic. Through October and November deadlines cluster and assessment centres begin. Target schemes with later deadlines and slower processes rather than racing rolling-deadline banking applications you cannot catch, and keep preparation to short, regular timed sessions rather than new ground. Starting late is worth far more than not starting.