Choosing between ISEE at home vs test center testing is one of the first big decisions parents make in the private school admissions process, and the right answer depends on more than just convenience. The Education Records Bureau (ERB) offers four ways to take the ISEE - at home with a remote proctor, at a Prometric center, at a school site, or at an ISEE Test Center - and each format has different costs, technology requirements, and proctoring rules. This guide breaks down every difference so you can confidently pick the format that gives your student the best chance to perform their best.
Most families researching ISEE at home vs test center testing are weighing three real options: ERB's at-home format, a Prometric center, or a school administration site. Each delivers the same exam, but the experience around the test - the cost, the proctoring style, the parent role, and the scheduling flexibility - can vary significantly. The table below shows the most decisive differences in one place.
| Feature | ISEE At Home | Prometric Test Center | School / ISEE Test Center |
|---|---|---|---|
| Format | Online only | Online only | Paper or online |
| Levels available | Primary, Lower, Middle, Upper | Grades 5-12 only | All levels (varies by site) |
| Approximate cost | $155-$205 | $200-$255 | About $140 early |
| Proctor | Live remote (Prometric) | On-site staff | Trained school or ERB staff |
| Parent on-site | Only for area scan | Required entire test | Generally not required |
| Test dates available | Most flexible | Limited | Most limited |
| Technical risk | Internet and device risk | Minimal | Online: minimal; Paper: none |
| Distractions | Home-controlled | Mixed test-takers nearby | School environment |
Format choice influences three things: what you pay, how stable the test environment is, and how easy it is to fit the exam into your family's schedule. It does not change the test itself, the difficulty, or how schools view the score. If you only have one shot at the ISEE this admissions cycle, picking the format that best matches your student's temperament and your home setup is more important than any prep tweak you can do in the last week.
ISEE at home testing launched in December 2020 when ERB partnered with Prometric to deliver the ISEE remotely through ProProctor. It uses a live human proctor watching the student through a webcam and a second-camera phone or tablet for the entire exam. The test content is identical to the in-person online ISEE - same questions, same scoring, same delivery - it is just delivered to your living room instead of a center.
Once you register, ERB emails a verification letter and a session number. About 30 minutes before your scheduled start time, you launch the ISEE by ERB app on your testing computer or tablet, pair a phone or tablet as a side camera, and connect with a live proctor. The proctor verifies your child's ID, scans the testing room with the second camera, and confirms no prohibited items are in view before unlocking the test.
The two-device setup is the biggest difference between ISEE online testing at home and at a Prometric center. Your primary device runs the Secure Browser, which locks the screen so no other applications, websites, or screenshots are possible. The secondary device runs Remote Proctor Connect and acts as a side camera placed about 18 inches from the student so the proctor can see hands, keyboard, and desk surface. Both must remain plugged in.
The ISEE remote proctor system has a strong track record. ERB has administered more than 85,000 ISEE At Home exams since December 2020 with a 99% successful completion rate. That means roughly one in a hundred students experiences a disruption serious enough to interrupt the exam - good odds, but not zero, which is why preparation and a backup plan matter.
"Test center" is one of the most confusing terms in ISEE preparation because parents use it to mean different things. In ERB's documentation, there are three different in-person options - Prometric centers, school sites, and dedicated ISEE Test Centers - and each has its own rules. Understanding the difference helps you compare apples to apples when you are deciding ISEE at home vs Prometric, or thinking about a school administration as a third path.
The standardized environment is the test center's main appeal. Lockers store personal items, on-site staff handle check-in, and there is no risk of household interruptions. The trade-off is travel and the possibility that younger students may sit alongside adult test-takers preparing for the GRE or GMAT, which some find intimidating.
Pricing is one of the biggest factors in the ISEE at home vs Prometric decision, and most competitor articles avoid quoting numbers because the fee structure changes by level. Here is the full breakdown of what each format actually costs in 2025-2026 based on ERB's published rates and Study.com's tracked figures. Note that Prometric pricing varies depending on whether you book small-group or individual testing.
| Testing Option | Cost Range | Available Levels | Registration Cutoff |
|---|---|---|---|
| School-administered (early registration) | About $140 | All levels (varies by site) | Set by school |
| ERB-administered at home (Primary) | About $155 | Primary Level (grades 2-4) | 3 days before test |
| ERB-administered at home (grades 5-12) | About $205 | Lower, Middle, Upper | 3 days before test |
| Prometric Test Center | About $200-$255 | Grades 5-12 only | Varies by Prometric center |
| Phone registration surcharge | +$30 | All formats | Same as base format |
The base fees are not the whole story. Phone registration carries a $30 surcharge over online registration, which is enough reason to register through the ERB website for nearly every family. At Prometric, rescheduling fees scale with how close you are to the test date - free if you change at least 31 days out, and progressively more expensive in the 30 to 5 day windows. You will not receive a refund if you cancel a Prometric test 4 days or fewer before your scheduled date.
ERB lets you cancel for a partial refund up to 90 days after you make payment. After the 90 day mark, no refund is available regardless of cancellation timing. For at-home testing, online registration must close at least 3 days before the test date, so families cannot register for or switch to an online test in the final 72 hours.
Technical readiness is the single biggest cause of at-home test failures, so this is the section to read carefully if you are leaning toward the at-home option. Every requirement below comes directly from ERB's official ISEE At Home guidance, and meeting them is non-negotiable - the proctor will not start the exam if your equipment fails the pre-test check.
| Requirement | Specification | Notes |
|---|---|---|
| Operating system | Windows 7+ or macOS 10.13+ | Tablets and iPads also work for some levels |
| Browser | Current Google Chrome | Required for Secure Browser launch |
| Webcam | Built-in or external | External must remain plugged in |
| Microphone | Built-in or wired | Bluetooth/wireless are prohibited |
| Internet speed | 0.5 Mbps minimum | Wired Ethernet strongly recommended |
| Headphones | Wired only | Bluetooth or wireless are prohibited |
| Second device | Phone or tablet with camera | Place 18 inches from student; keep plugged in |
| Required apps | ISEE by ERB + Remote Proctor Connect | Install at least 3 days before test |
ERB recommends a multi-day setup window for at-home testing. About a week out, read the ISEE At Home Family Guide and confirm both apps install on your devices. Three days before the test, complete a practice check-in - this is the step that catches the most issues. Thirty minutes before the test, begin the official check-in with your live proctor.
Worked Example: Preparing for the ISEE at home
Setup: A family is registering their 6th grader for the ISEE at home next Saturday and wants to make sure their setup will pass the proctor's pre-test check.
Both formats work for most students, and neither is universally better. The right format depends on which set of trade-offs your family can manage. The lists below summarize where each option is strongest and weakest based on parent feedback, ERB's official guidance, and common patterns reported by ISEE tutors.
At-home testing wins on convenience and scheduling flexibility - more dates are available than at any other format, and there is no travel. Many test-anxious students perform better in their familiar bedroom or living room than in a strange building. The downsides are real, though: technical reliability depends on your home setup, and the proctoring rules are strict. A sibling walking through the room, a doorbell, or a barking dog can pause or even cancel the test, and ERB does not refund the fee if a rule violation caused the disruption.
Test centers - both Prometric and school sites - eliminate the technical and environmental variables that worry parents about at-home testing. There is no risk of personal device failure, no internet drops, and an in-person proctor can resolve issues immediately. The trade-offs are travel, parking, and the requirement that a parent stay on-site at Prometric for the entire test (which can run multiple hours). Younger students may also find Prometric's mixed test-taker environment intimidating since they will share waiting space with adult GRE or GMAT candidates.
The proctoring rules are equally strict in both formats - the difference is who controls the environment. At Prometric, the test center handles the rules, so your job is just to show up and follow instructions. At home, you are responsible for clearing the room of any prohibited items (books, calculators, smartwatches, extra monitors, smart speakers), keeping the second camera in position, and ensuring no one walks through during the test. Pets and younger siblings are the most common cause of voided at-home tests.
When parents look up ISEE testing options, they really want a recommendation rather than a list. This decision framework matches the most common student profiles to the optimal format based on the trade-offs covered above. Use it as a starting point and double-check that the format you pick has dates available before your child's school application deadlines.
| Student Profile | Recommended Format | Why |
|---|---|---|
| Test-anxious or first-time test-taker | ISEE at home | Familiar environment lowers stress and increases focus |
| Easily distracted at home (siblings, pets, noise) | Prometric or school | Standardized environment removes household variables |
| Strong with computers, tight schedule | ISEE at home | Most flexible date and time options |
| Prefers paper-and-pencil and annotation | School site (paper) | Only paper option still widely available |
| Limited household budget | School-administered | Lowest typical fee at about $140 |
| Lives far from any Prometric center | ISEE at home | Avoids long travel on test day |
| Spotty internet at home | Prometric or school | Removes single biggest at-home failure point |
Match a student situation to the recommended ISEE testing format.
You have reliable internet, your child has tested anxiety about new environments, scheduling is tight, or you live far from a Prometric center. Younger Lower Level applicants in particular often benefit from the comfort of testing in a familiar room with a parent nearby for the area scan.
Your home is loud or unpredictable, your child performs better in formal testing settings, or you simply want zero technical risk. Upper Level applicants entering high school typically handle Prometric well because the environment matches what they will encounter for high school standardized tests.
Cost is a major factor, your child prefers the feel of paper-and-pencil testing, or there is a participating school nearby with available dates. School-administered ISEEs are usually the cheapest at around $140 with early registration, which is meaningful if you are also budgeting for tutoring or multiple practice tests.
The proctoring strictness is comparable across formats - you should expect the same vigilance from a remote proctor as from an in-person one. The difference is in the pre-test routine and what happens if something goes wrong. Here is the play-by-play for each ISEE testing option.
Begin the official check-in 30 minutes before your scheduled start time. The live proctor verifies your child's ID, has the parent help with a testing area scan using the second camera, and checks for prohibited items. Scratch paper and a pencil are allowed but must be shown to the camera before the test starts and torn up on camera at the end. Parents leave the room once check-in is complete. The test runs as a single session with built-in break.
Arrive 15 minutes before your scheduled start time with the verification letter and approved student identification. The center provides lockers for personal items - no phones, smartwatches, or unapproved calculators are allowed at the testing station. A parent or guardian signs in alongside the student and waits in the lobby for the entire test duration. Tissues and dry-erase boards are typically provided.
Schools and ISEE Test Centers vary more than Prometric does. Paper sites issue physical test booklets and answer sheets, allowing students to write directly on the test - the only format where this is possible. Online sites at schools mirror the Prometric experience but use school staff as proctors. Confirm with your specific site whether parents are expected to wait or can leave during the test.
The ISEE itself is identical in content, scoring, and difficulty no matter where you take it - ERB uses the same test bank for every format. What differs is the testing environment. At-home tests can be disrupted by technology or distractions, while test centers have stricter rules but a more standardized atmosphere. Schools view scores from any location the same way, so neither format is inherently easier or harder.
ERB-administered at-home testing ranges from about $155 for the Primary Level to $205 for grades 5-12. Prometric Test Centers charge approximately $200-$255 for online testing, depending on level and whether you book small-group or individual testing. School-administered ISEEs are usually the cheapest at around $140 with early registration. Phone registration adds $30 to any option, so most families register online to save money.
If your internet disconnects, the Secure Browser pauses the test. Reconnect quickly and the proctor can resume from where you stopped. Severe disruptions may require rescheduling, and ERB does not refund the testing fee if a rule violation caused the issue. Despite this risk, ERB reports a 99% successful completion rate across more than 85,000 ISEE At Home exams since December 2020.
A parent or guardian must be present during the testing area scan at the start of the exam. The proctor uses the second camera to sweep the room and confirm no prohibited items are visible. Once check-in is complete, the parent should leave the room so the student can test alone. At Prometric, by contrast, a parent must remain on-site for the entire exam.
Yes, but timing matters. ERB allows free rescheduling at Prometric if you change at least 31 days before the test, with increasing fees as the date approaches. You will not receive a refund if you cancel a Prometric test 4 days or fewer before your scheduled date. Online at-home registration closes 3 days before the test, so plan format switches early.
You need a testing computer or tablet with a built-in webcam and microphone running Windows 7+ or macOS 10.13+. A second device (phone or tablet) acts as the side camera, placed about 18 inches from the student. Wired headphones are allowed; Bluetooth and wireless are prohibited. Internet must be at least 0.5 Mbps, and a wired Ethernet connection is strongly recommended.