How to apply for internships: what to send, when, and how many (summer 2027)

Internships.com is a Chegg service. Where our own tools can help, this guide mentions them.

Key takeaways

• To apply for an internship, match one tailored one-page resume to one specific posting, submit it through the employer's own portal, and log the application the same day.
• Federal applications have a hard limit. Since September 27, 2025, USAJOBS has rejected any resume longer than two pages, and the U.S. Office of Personnel Management says an applicant whose only resume is longer is ineligible for further consideration.¹
• This fall, boutique consulting and engineering are the windows most likely to be open. Boutique consulting firms recruit from September to December, later than large firms, which open applications anywhere from early spring to August, with many deadlines around late March.² Use any range as a prompt to check the firm's own page, not as a deadline.
• Smaller nonprofits, startups, and smaller firms often hire later, in spring 2027, so if you're still searching in spring, you haven't missed them.²
• Many large employers review applications on a rolling basis, so applying soon after a posting goes live gives you a better chance at an interview slot.²
• There's no reliable research-backed "right number" of applications. Send as many as you can tailor well, and spread them across employers that recruit on different calendars.

If you don't have a list of roles yet, start from live listings. As of October 27, 2026, Internships.com lists almost 40,000 open internships. You can browse by field, such as Engineering (more than 13,000), Operations (almost 8,900), and Finance (more than 4,400), or by city, such as New York (more than 1,600) and Chicago (more than 850). Pick a field and two or three cities before you open a resume file.

What should you send with an internship application?

Most internship applications start with a one-page resume. What else you send depends on who's hiring. The table shows common asks by employer type. They're patterns, not rules, and the posting always wins.

The two-page federal limit is a hard cutoff. The Office of Personnel Management's applicant guidance says an applicant whose only resume exceeds two pages is ineligible for further consideration.¹ Federal resumes also need details a corporate resume leaves out, such as hours worked per week, so don't reuse a corporate resume unchanged.

When should you apply for summer 2027 internships?

Apply soon after a posting opens. Many large employers review on a rolling basis, so interview slots can fill before the listed deadline.²

Some sectors are mostly done. Investment banks recruit roughly 18 months ahead, so the summer 2027 banking cycle is largely over.² The rest of finance isn't: Internships.com listed more than 4,400 open finance internships on October 27, 2026, across accounting, financial analysis, tax, insurance, wealth, and risk.

Still open this fall: boutique consulting, engineering, software programs that haven't filled yet, and large biotech and pharma programs. Startups and nonprofits often hire later, so if you're still searching in February 2027, you haven't missed those.² Research labs and federal agencies run on their own timelines: ask a lab early, and expect federal hiring to take several months from posting to start date. For the full calendar by sector, see the summer 2027 internship timeline.

How many internships should you apply to?

Apply to as many as you can tailor well, across several employer types. We haven't found a credible, current study that pins down an ideal number for students, so treat any exact figure you see online with suspicion.

What matters more than the number:

• Rolling windows reward timing. Ten applications sent the week each posting opens are likely to do better than thirty sent in one weekend after interview slots have started filling.
• Calendars differ. A student applying only to big tech is betting on one cycle. Adding mid-size companies, startups, and nonprofits spreads your applications from September 2026 through spring 2027.
• Tailoring takes time. If every resume you send is identical, you're trading quality for volume. Alongside classes, a handful of properly tailored applications a week is a realistic pace for many students.

You won't run out of postings; your time is the limit, so spend it on roles where you meet most of the requirements.

How do you tailor a resume to an internship posting?

Tailoring means rewriting your experience so someone scanning for the posting's requirements finds them fast. Assume the first look at your resume is a scan, not a read.

In practice:

• Lead each bullet with a verb and a result: "Built a Python script that cut weekly report time from 3 hours to 20 minutes."
• Use the posting's exact term when it's accurate. "Customer success" and "client support" can mean the same thing, but your resume should use the posting's word.
• Put a skills line near the top if the posting lists tools.
• Cut high school items unless you're a first-year with nothing else.

Rewriting every bullet for every application isn't realistic. Keep a master resume, make three or four versions by role type, and adjust the top third for each posting.

Before you send a batch of applications, run your resume through our Resume Builder. It checks your resume against the role you're targeting, flags skills that role usually asks for that you haven't listed, and points out bullets that list duties instead of results. With Career membership, you can also get a version tailored to a specific posting.

Do you need a cover letter for an internship?

You need a cover letter when the posting requires one, and it's worth writing one when it's optional and you can say something specific. A generic letter adds reading time and no information.

A good cover letter is three short paragraphs: why this team (name a real product, report, or case), the one or two experiences that match the posting's top requirements, and your availability.

At nonprofits and in research, a cover letter or email can matter as much as the resume. Those employers are often hiring for fit with a mission or a line of research, and a letter shows you've read their work.

How do you apply for an internship, step by step?

Match one tailored resume (and sometimes a cover letter) to one specific posting, submit early, and follow up. Step by step:

1. Read the posting twice. The first pass tells you whether you qualify. On the second pass, copy the required skills and phrases ("SQL," "client-facing," "familiarity with Figma") into a note. Those phrases are your resume keywords.
2. Tailor a one-page resume. Mirror the posting's language where it's true for you. Put the most relevant experience first, even if that experience was a class project.
3. Decide on the cover letter. If it's required, write a specific one. If it's optional, write one only if you have a real reason you want this team. If there's no field for it, skip it.
4. Gather the extras. Portfolio link for design, writing, or engineering roles. Unofficial transcript if the posting asks for GPA verification. A writing sample for policy, law, or media roles.
5. Submit on the employer's own site. Most listings link out to an applicant tracking system such as Workday or Greenhouse. Fill every field even when it duplicates your resume, because some systems may filter on those fields rather than the PDF. Our Chrome extension fills in those fields on Greenhouse, Lever, Ashby, and Workday, and on other sites once you give it access. You still review and submit. With Career membership, on many sites you can use Apply for me instead: you answer a few questions, and we submit the application for you. It isn't available on Workday or LinkedIn.
6. Log it the same day. Track every application in one spreadsheet, with the columns listed in the next section.
7. Follow up once. A week or two after applying is a reasonable time, if you have a recruiter or alum to write to. Our follow-up email guide has wording you can use.
8. Prepare for the screening before you're invited. Recruiter calls and online assessments can come within days of a rolling application.

If you haven't found roles to apply to yet, start with "How to find an internship" and come back.

How do you track and follow up on internship applications?

Keep one spreadsheet with a status column, and follow up only when you have a person to write to; a generic careers inbox is less likely to get you a reply.

Useful columns: company, role, posting link (save a PDF, since postings disappear), date applied, resume version, contact, status. The resume-version column matters when a recruiter calls three weeks later and asks about a bullet you no longer remember writing.

Not every employer sends rejections for internship roles. After about six weeks of silence, mark the application closed.

How do you prepare for the first internship screening?

The first step after a rolling application is often a short recruiter call or an online assessment. Recruiter calls tend to cover why this role, your availability, your location, and a question or two about your resume.

Before you apply, have answers ready for "walk me through your resume," "why this company," and "tell me about a project you're proud of." For online assessments, check whether the employer describes the format on its careers site, then practice under time pressure.

Frequently asked questions

How do I apply for an internship with no experience?

Apply with a one-page resume built around class projects, campus jobs, clubs, and volunteer work, framed with the same skills the posting asks for. Programs aimed at first- and second-year students expect limited experience; see our guide to internships for freshmen and sophomores.

Should my internship resume be one page?

Usually, for private employers. Federal applications are the exception, with a two-page limit (see the table above).

How long does it take to hear back from an internship application?

It varies from days to months, and not every employer sends a rejection. Rolling programs can move within a week or two of your application.

Can I apply to multiple internships at the same company?

Usually yes, but check the portal's rules first, since policies differ by employer. Apply only to roles you'd actually take, and assume a recruiter there may see every role you applied to.

Footnotes

1. U.S. Office of Personnel Management, Agency guidance on the two-page limit on resume length. ↩ ↩²

2. Yale Office of Career Strategy, Industry hiring timelines, as of October 20, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶