Summer internships: when to apply and how to prepare

Waiting until spring to think about summer internships? It’s late in the day, but don’t you worry—we’ve got everything you need to secure that last-minute spot.

Here’s what you need to know about when applications open, what to have ready, and how to avoid missing deadlines.

Why the timeline matters

Most student internships run from June to August, lasting anywhere from six to twelve weeks. That part’s obvious. What catches people out is that the hiring process starts way earlier than that, sometimes almost a year in advance.

And it’s not just about submitting before a deadline. Many of the most competitive programmes use rolling recruitment. This means they’re reviewing applications and filling spots as they come in. By the time the official deadline hits, a lot of roles are already gone. Applying on the last day of a rolling intake is kinda the same as missing the deadline entirely.

When do summer internship applications open?

This is the part that varies, and getting it wrong is how people can miss out.

Finance and investment banking

This industry requires applications earlier than any other. The world’s biggest banks, like Goldman Sachs and JP Morgan, post summer analyst roles in August for the following summer. Over 60% of interview slots at top firms fill up in the first application wave.

If you’re eyeing a finance internship for summer 2027, applications are opening right around now.

Consulting

McKinsey, BCG, and Bain moved their windows forward in recent cycles. Applications for summer 2027 are expected to open in September-October 2026, so be prepared to get your application sorted nice and early.

Law

Vacation schemes typically open from January to March for summer schemes running that same year. The biggest (AKA Magic Circle) firms tend to close fast, so get in there quickly.

Big tech

Google, Amazon, and Microsoft don’t run a fixed annual intake. They post roles on a requisition basis throughout the year and close them when the hiring manager is happy. Roles may close within 48 hours of going live, so set job alerts and be ready to pounce!

FMCG, marketing, and smaller companies

Internships for these roles are much more flexible. Rolling timelines mean you can sometimes apply two to four weeks before the start date. Startups especially hire quickly and with shorter lead times.

For a breakdown of live opportunities, deadlines, and advice, Prospects and TargetJobs are reliable.

Getting ready to apply

The worst time to write your CV is the night before a deadline. Here’s what to sort in advance:

• CV: one page, tailored to the sector, achievements over responsibilities. If you haven’t looked at yours since you wrote it for your part-time job, it needs work. The UNiDAYS guide to writing a graduate CV is a solid place to start.
• Cover letter template: you’ll need to personalise each one, but having a strong base saves time when you’re applying to multiple roles.
• Online assessments: most large employers now use psychometric tests or situational judgement tests as a first filter. Do a few practice rounds before your applications go in, rather than going in cold.
• A LinkedIn profile: recruiters check LinkedIn, so make sure it’s complete. A blank LinkedIn with no photo and three connections is worse than no profile at all.
• References: some applications ask for references at submission. Know who you’d use before you need them.

Internships abroad

If you’re looking at a summer internship abroad, the same rules apply—but with extra layers of planning around visas.

Depending on the country, you may need a work visa, and visa processing can only start after you have a confirmed offer. That means you need your internship secured at least four to six months before your start date. Don’t start applying to roles that require relocation without factoring this in—finding out after the offer is a nightmare.

What to do if you’ve already missed the deadlines

Ok, so the formal deadlines aren’t the whole picture. The informal market—direct outreach, networking, cold emailing companies you’d genuinely like to work for—runs year-round. It also picks up a significant chunk of internship hires.

A few things worth trying:

• Email the recruiter directly if the role has closed to ask if the programme is full or if they accept late applications
• Look at smaller companies and startups, as they hire on much shorter timelines and there’s often less competition
• Check if your university careers service has exclusive partnerships with employers
• Consider a spring week or shorter insight programme as a route for next year’s summer internship cycle

Not sure where to start with direct outreach? Our student internship guide covers the basics of finding and approaching employers.

The early bird gets the internship

The students who land the best internships aren’t always the ones with the best grades. They’re the ones who started early, kept track of deadlines, and had their application materials ready before the roles went live.

Sort your CV, set your alerts, and start applying—even if it feels early. It almost certainly isn’t.

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