Costco Internship 2027–2028: Programs, Pay, Deadlines & How to Apply

Last updated: July 2026

A Costco recruiter shared the numbers on r/csMajors: 12,600 applicants for 40 IT internship spots, roughly a 0.3% acceptance rate. That makes Costco Digital Services more selective than most Ivy League admissions. And CDS is just one of seven internship tracks at the company ranked #12 on the Fortune 500 with $275.2 billion in revenue and 133 million cardholders worldwide. For the 2027–2028 cycle (you apply during 2026, you intern in summer 2027), IT postings are expected to appear as early as August 2026 with windows as short as 10 days. Miss the posting and you have missed the year.

Quick Facts

The two numbers that matter: IT posting windows as short as 10 days expected August–September 2026 for summer 2027, and $31.90 per hour confirmed pay. Only IT and Accounting tracks are open to non-Costco employees.

Externships are short, remote professional experience programs where you finish a real project with a real company. The Hydroficient IoT Cyber Defense Externship builds exactly the cybersecurity and systems-thinking evidence that a Costco CDS application needs, and the Beats by Dre Data Analytics Externship adds the data analysis chops that span every IT sub-track. Explore all Externships.

What Is a Costco Internship?

A Costco internship is a paid, 12- to 13-week summer placement that puts college students into real roles across seven departments at the company that Glassdoor interns rate 4.0 out of 5 with a perfect 5.0/5 for compensation and 100% of reviewers recommending it to a friend. IT interns earn $31.90 per hour, work on production systems serving 133 million cardholders, and follow a hybrid model of 3 days onsite and 2 remote at Costco's headquarters in Issaquah, Washington. The program is described as a legitimate pathway to permanent roles rather than a purely educational experience, and an estimated 60–70% of strong performers receive full-time offers with starting salaries of $85,000–$105,000.

When Do Costco Internship Applications Open for 2027–2028?

Costco's calendar runs earlier than most retail companies for IT, but later for corporate tracks. IT and CDS internship postings have historically appeared in late August through September for the following summer, with posting windows sometimes lasting only 10 days. Accounting and finance roles post later, around January through March. The entire IT hiring process from application to offer averages about 16 days, which means if you see the posting, you need to be ready to apply the same week. Costco also runs a winter IT internship cycle from January through April, doubling your shot at a CDS seat.

Why You Must Apply the Week Applications Open

Costco postings state they may close before the listed deadline as positions fill, and Reddit users confirm that applying within the first three weeks of the posting correlates with higher interview rates. When the window is only 10 days to begin with, that first week is most of the window. And the math is brutal: 12,600 applicants for 40 IT spots means every day of delay pushes you further into a pile that's already 315-to-1. The postings aren't announced in advance. You find out they exist by checking the CDS careers site, and by the time word spreads on Reddit, the early seats are gone.

Which Costco Internship Programs Should You Target?

Costco runs seven structured internship tracks, but here is the critical distinction most guides miss: only IT (via Costco Digital Services) and Accounting are consistently open to non-Costco employees. The other five tracks require existing warehouse employment, typically at least two years.

IT sub-tracks within CDS include Application Security, Platform Security, Email Security, Mobile Development, SEO/Data Analytics, Application Integration, Innovation, Sustainability, and Software Engineering. See the full list at costco.com/career-opportunities. And note the split calendar: IT recruits in fall (August–September for the following summer), while Accounting and Finance recruit in winter and spring (January–March).

What Are the Eligibility Requirements?

Costco publishes clear eligibility requirements across its IT and accounting postings:

• GPA: minimum cumulative GPA of 3.0 on a 4.0 scale. Competitive applicants typically present 3.3 or higher.

• Enrollment: must be currently enrolled full-time in an undergraduate or graduate program (community college, four-year college, or university). Full-time enrollment required during the fall and spring semesters immediately before and after the internship.

• Internal tracks: Marketing, Merchandising, Supply Chain, HR, and SIT require at least 2 years of Costco warehouse employment. Application is through the internal job bank, not the public careers site.

• Background check: drug screen and background check required for all tracks.

• International students: F-1 visa holders eligible via CPT or OPT. H-1B sponsorship unlikely for internships but possible for strong full-time conversions.

Can Non-Employees Get a Costco Internship?

This is the single most important eligibility question for Costco, and the answer is narrower than most applicants expect. A current Costco employee confirmed on Reddit that only IT (through Costco Digital Services) and Accounting Division internships are consistently open to non-employees. Everything else, including the popular buying, merchandising, and supply chain tracks, requires existing Costco warehouse employment of at least two years. The SIT program is exclusively internal. So if you aren't already a Costco employee, your options are IT or Accounting, and it's where most of the seats and sub-specializations live.

What Skills Does Costco Look For, and How Do You Build Them?

Costco’s IT internship postings and interview reports reveal a skills profile that's more practical and systems-oriented than a typical tech internship. The coding assessment uses cyberByte with real-world scenarios rather than LeetCode-hard puzzles, and the final interview blends technical deep-dives with STAR-format behavioral questions. Costco cares whether you can debug production code and explain your reasoning to a non-technical stakeholder. Across all tracks, understanding Costco’s membership-based business model comes up repeatedly in interview prep guides.

How Is Demand for Retail-Tech Interns Moving Right Now?

Build These Skills Before You Apply

And every skill in the chart maps to a remote Externship where you finish a real company project before the posting window opens.

How close is the overlap? The Hydroficient deliverable is a cybersecurity assessment in CDS’s own vocabulary, and the real-company data project both analytics Externships end on is the “practical coding and debugging” line item the cyberByte assessment tests.

What Is the Costco Application and Interview Process Like?

Costco’s hiring funnel for IT roles runs three stages and averages about 16 days from application to decision:

1. Apply on the CDS careers site (IT) or costco.com/career-opportunities (Accounting/corporate) with a resume. Monitor the site daily starting August 2026 since posting windows can be as short as 10 days.

2. Phone screen with HR (~30 minutes): background, experience, and motivation. This is a conversation confirming the role and your fit, not a technical grilling.

3. Online coding assessment via cyberByte (IT roles only): 3 coding assignments plus 1 theoretical questionnaire. Time-limitless with one attempt; built-in search allowed for syntax reference. Focus on practical coding, debugging, system thinking, and edge-case handling. For data-heavy roles, expect HackerRank-style SQL and Python assessments instead.

4. Final interview with hiring manager: behavioral questions in STAR format plus a technical deep-dive. Research Costco’s membership business model and recent tech initiatives. Glassdoor intern reports describe the process as straightforward and practical.

Non-technical tracks (Accounting, Finance) skip the coding assessment and run a two-stage process: an initial phone or campus interview with a recruiter, followed by a behavioral interview with a manager. The internal SIT program uses a points-based selection system factoring in tenure, performance reviews, and availability. Prep recommendation: 50+ LeetCode Easy-Medium problems, plus our HireVue question guide with a free AI mock tool for behavioral practice.

What Students on Reddit Say

Three threads show the process and the culture from the inside.

How Do You Stand Out When 12,600 People Apply for 40 Seats?

Three moves, all executable before August. First, monitor the CDS careers site daily starting in late July; the posting window can close in 10 days, and early applicants face fewer filled seats. Second, build the specific proof Costco’s coding assessment tests: practical debugging, edge-case handling, and systems thinking, not abstract algorithm puzzles. A finished cybersecurity or data analytics project in your portfolio answers the cyberByte assessment’s implicit question: can this person write production-quality code? Third, learn the business. Costco’s final interview asks why you want to work here specifically, and the answer that lands is one grounded in understanding the membership model, the 133-million-cardholder scale, and what it means to build technology for the third-largest retailer in the world. Prepare behavioral answers in STAR format that show you can explain technical decisions to non-technical stakeholders.

What Other Companies Should You Consider?

Costco’s peer set splits by what you want: retail-tech giants with more intern seats, or membership-model companies with a similar culture.

Costco’s advantage in this peer set is the combination: top-tier pay ($31.90/hr), a high conversion rate (60–70%), a hybrid work model, and a company culture that Glassdoor interns rate with a perfect compensation score.

FAQ

When do Costco internship applications open for summer 2027?

Based on the 2025–2026 cycle, IT/CDS internship postings typically appear in late August through September 2026, with very short posting windows (sometimes only 10 days). Accounting and corporate tracks open later, around January–March 2027. Costco hasn't published 2027 dates yet, so monitor the CDS careers site and Costco's main career portal starting in August 2026.

What GPA do you need for a Costco internship?

The minimum requirement is a 3.0 cumulative GPA on a 4.0 scale for IT and accounting tracks. However, competitive applicants typically present GPAs of 3.3 or higher. Strong technical projects, relevant coursework, and prior Costco employment (for internal tracks) can offset a borderline GPA.

Are Costco internships paid, and how much do they pay?

Yes, all Costco internships are paid. IT/CDS summer interns earn $31.90 per hour for 40 hours per week, which translates to roughly $15,000–$16,600 over the 12-week program. Compensation for other tracks ranges from $25 to $40 per hour depending on the department. This is about 32% above the national average for interns. Housing and relocation aren't provided.

Can non-Costco employees apply for internships?

Only certain tracks accept external applicants. IT internships through Costco Digital Services (CDS) and Accounting Division internships are consistently open to non-employees. Most other corporate internships (buying, merchandising, HR, supply chain) require existing Costco warehouse employment of at least 2 years. The SIT program is exclusively for current employees.

What is the Costco internship interview process like?

For IT roles, expect a phone screen with HR, followed by an online coding assessment on cyberByte (3 coding problems plus 1 theory question), and a final interview with the hiring manager covering both technical and behavioral questions. Non-technical tracks typically involve two interview rounds: one with a recruiter and one with a manager. The entire process averages about 16 days.

Do Costco interns get return offers?

An estimated 60–70% of strong-performing interns receive full-time offers, which is significantly higher than the industry average of about 51%. Full-time starting salaries for IT roles are in the $85,000–$105,000 range at the Issaquah headquarters. Costco describes the internship as a legitimate pathway to permanent positions.

What departments offer Costco internships?

Costco offers internships across seven main tracks: Information Technology (software, cybersecurity, data science), Corporate Finance, Accounting, Marketing and Merchandising, Supply Chain and Logistics, Human Resources, and the Supervisor in Training (SIT) program. The IT division has the most sub-specializations, including Application Security, Mobile Development, Data Analytics, and Software Engineering. However, only IT and Accounting are regularly open to external applicants.

Where are Costco internships located?

Nearly all corporate and IT internships are based at Costco’s headquarters in Issaquah, Washington (Seattle metro area). IT interns follow a hybrid model of 3 days onsite and 2 days remote per week. Interns must arrange and pay for their own housing at $1,500–$1,900 per month near Issaquah. The SIT program is available at warehouse locations nationwide. International students on F-1 visas can participate via CPT or OPT.

The posting window is 10 days and 12,600 people are watching the same site. Spend the runway building proof: a remote Externship turns “interested in tech” into a finished cybersecurity or data analytics project a same-week application can point at.