- The H1 Price at a Glance
- How the Fee Is Built: Test Fee Plus Registration
- Ordering More Than One Test
- Recertification Costs and the $220 Ceiling
- What a Retake Really Costs
- Costs That Never Appear on the Receipt
- Where to Spend (and Not Spend) on Preparation
- A Sample Budget for a First-Time Candidate
- Frequently Asked Questions
- A single initial H1 attempt costs $62 test fee plus $34 registration, totaling $96 before applicable tax.
- ASE publishes no member versus non-member price split for H1 or other tests.
- Recertification test fees are capped at $186 per order, so the maximum total is $220 with registration.
- You must test within 90 days of purchase, and wait 30 full days before repurchasing the same test.
The H1 Price at a Glance
The Transit Bus Certification - H1 Compressed Natural Gas (CNG) Engines test is administered by the National Institute for Automotive Service Excellence (ASE) and delivered through Prometric. The pricing is refreshingly simple compared with many professional credentials: there is no application fee stacked on a separate exam fee, no mandatory course, and no tiered membership discount to decode.
| Cost Item | Amount (USD) | Notes |
|---|---|---|
| H1 test fee | $62 | Charged per test |
| Registration fee | $34 | Charged once per order, not per test |
| Single initial H1 attempt | $96 | Before applicable tax |
| Recertification test fees | Capped at $186 per order | Same general-test fee schedule |
| Recertification maximum total | $220 | $186 cap plus $34 registration, before tax |
If you are still deciding whether to pursue the credential at all, pair this cost analysis with our ROI analysis of the H1 certification and the H1 salary guide so the $96 is weighed against realistic career outcomes.
How the Fee Is Built: Test Fee Plus Registration
ASE splits what you pay into two pieces. The test fee is attached to each individual test you take. The registration fee is attached to the order itself. For a technician buying exactly one test, that means $62 plus $34. Sales tax, where applicable, is added on top, so your final charge may differ slightly depending on where you purchase.
One detail matters here: ASE does not publish a separate price for members versus non-members, because the pricing model is not built around membership. When you see a prep site or forum post claiming a "discounted" H1 price, treat it with skepticism. The official fee schedule on ASE's registration page is the only number that counts.
Ordering More Than One Test
A registration order can contain more than one test. This is the single most useful cost lever for a transit technician. Because the $34 registration is charged per order rather than per test, bundling your tests into one order avoids paying that fee repeatedly.
For example, if you work on a mixed transit fleet and plan to test in several H-series specialties, placing them in one order means one registration charge covers the whole purchase. Each additional test then adds only its own $62 test fee. Compare that with placing three separate single-test orders, which would incur three registration fees.
The Trade-off: The 90-Day Clock
Bundling has a constraint. You must schedule and test within 90 days of purchase. If you buy multiple tests in one order, you need to be ready to sit all of them within that window, or the unused ones are at risk. Only bundle tests you genuinely intend to take soon. If your preparation for one test is months away, a separate later order may be the safer choice despite the extra registration fee.
Scheduling logistics are covered in more detail in our guide to H1 exam dates, testing windows, and deadlines.
Recertification Costs and the $220 Ceiling
H1 certification is valid for five years. To renew, you pass H1R, a separate 25-question recertification test with no extra research questions and a 30-minute time limit. Previously certified candidates remain eligible for recertification even after their certification has expired.
Recertification uses the same general-test fee schedule as initial testing, with one important protection: recertification test fees are capped at $186 per order. Add the $34 registration and the ceiling is $220 before applicable tax. For a technician renewing a single H1, the cost is far below that ceiling, but the cap matters if you hold several certifications that expire around the same time and want to renew them together.
Remote Option for Renewal
Prometric ProProctor is available for H1 recertification, subject to remote-testing requirements. That can save travel time and fuel if the nearest test center is far from your depot. Be aware that this applies to recertification only. Initial H1 is taken at a secure Prometric test center and is not an at-home exam.
What a Retake Really Costs
If you do not pass, you pay again. A retake means a fresh purchase: another $62 test fee plus another $34 registration if it is a new order, for $96 before tax. You must also wait 30 full days after a pass or fail result before purchasing and scheduling the same test again.
That waiting period has a financial side effect people overlook. The cost of a failed attempt is not only $96. It is also a month of delay, a possible second day off work, and a second trip to the test center. Seen this way, the cheapest path is rarely the one that skips preparation.
For a sense of how demanding the test is before you commit money, read how hard the H1 exam is. Note that no verified H1-specific pass rate has been published in the official sources, so our H1 pass rate analysis explains why you should be wary of any single figure quoted online. Likewise, the exact current cut score was not verified in official public sources; see our passing score breakdown for what is and is not known.
Costs That Never Appear on the Receipt
The ASE invoice covers only the fees. A realistic H1 budget accounts for several indirect items.
- Time away from the shop. The initial test allows 75 minutes, but appointment check-in, the tutorial, and a survey add to that. Plan for a partial day including travel.
- Travel to a Prometric center. Initial H1 cannot be taken remotely, so mileage and parking apply.
- Experience documentation. Certification requires two years of relevant full-time repair-technician experience, or the part-time equivalent. ASE permits specified education or training substitutions and requires documentation for approval. Gathering employer verification costs time even if it costs no money.
- Study materials. The core official study guide is free to download; see the next section.
The Experience Rule and Your Timing
One cost-saving fact: candidates may sit H1 before meeting the experience requirement but cannot receive certification until it is met. If you are close to the two-year mark and your 90-day window is open, you can pass now and have the certification issued once experience is documented. Education and training substitutions cannot be stacked, and ASE reviews the paperwork. Our H1 requirements guide walks through eligibility in detail.
Where to Spend (and Not Spend) on Preparation
The most important free resource is the official source itself. The Official ASE Study Guide: ASE Transit Bus Tests (copyright 2026) contains the H1 test specifications, task list, and official sample questions. It costs nothing, and it defines exactly what the test covers. Any money you spend on top should be justified against it.
Be careful about one assumption: ASE's official list of paid practice tests does not include H1. That means you will not find an official paid H1 practice product to buy from ASE. Third-party practice material is your choice, not a requirement, and no mandatory H1 prep course exists. Spend selectively.
Let the Weighting Guide Your Dollars
The test has 60 questions: 50 scored plus 10 unidentified unscored research questions. The scored portion is divided across eight content areas, and spending should follow that distribution.
Fuel System Inspection, Diagnosis, and Repair (28%)
The largest area, worth 14 of the 50 scored questions. If you buy only one targeted resource, make it relevant to CNG fuel systems.
- High-pressure fuel storage, lines, and regulation concepts
- Inspection and leak-related diagnostic reasoning
- Fuel delivery component faults and their symptoms
General Engine Diagnosis (18%)
The second-largest area. Strong diagnostic reasoning here pays off across multiple other domains.
- Symptom-based diagnosis of drivability and performance complaints
- Reading a scenario and ruling out causes methodically
Air Induction and Exhaust Systems Diagnosis and Repair (14%)
The third-largest area, and a natural fit for hands-on experience if you already service transit coaches.
- Intake restriction and boost-related concepts
- Exhaust system faults and their effect on engine operation
The remaining five areas, Cylinder Head and Valve Train, Engine Block, Lubrication and Cooling, Starting and Charging, and Ignition System, are weighted at 8% each. See our complete guide to all 8 H1 content areas for topic-level detail on each.
Match Practice to the Question Style
The format is computer-delivered multiple choice with one correct answer per question. Official samples include diagnostic scenarios, Technician A/Technician B questions, EXCEPT questions, and diagram-based items. No hands-on practical is specified for H1. Practicing these exact formats is worth more than reading additional theory. Try a few questions on our H1 practice test site to see how you handle the Technician A/Technician B structure before you pay the $96.
Key Takeaway
Do not pay for preparation that duplicates the free official study guide. Spend only on practice questions that mimic the real formats, and weight your effort toward the Fuel System domain first.
A Sample Budget for a First-Time Candidate
Here is how a straightforward first attempt might be organized, using only fixed, published amounts. Treat travel and time as personal variables rather than fixed numbers.
| Scenario | ASE Fees | What to Watch |
|---|---|---|
| Pass on first attempt | $96 before tax | Test within 90 days of purchase |
| Retake after one miss | $96 + $96 = $192 before tax | 30 full days between attempts |
| Renewal in five years | Up to $220 before tax | Pass H1R; remote option available |
The retake math is the argument for modest, focused preparation. An extra attempt more than doubles your outlay compared with passing once. Our H1 study guide covers how to structure your preparation so you are not paying twice.
A Brief Pacing Idea Tied to the Weighting
If you have several weeks before your purchase, sequence your study by weight: begin with Fuel System (28%), follow with General Engine Diagnosis (18%), then Air Induction and Exhaust (14%), and fold the five 8% areas into the final stretch. Buy the test only once you are within a few weeks of readiness, so the 90-day clock never works against you. For a compact final-week review, the H1 cheat sheet condenses must-know facts onto one page.
Who Pays? Employer Reimbursement
Transit agencies and fleet operators that run CNG buses have a clear interest in certified technicians. If you work for one, ask about reimbursement before you register. A $96 fee is easy for an employer to approve, and a written commitment avoids the 90-day window passing while paperwork stalls. For a view of where the credential is used, see our overview of H1 jobs and the career picture in the H1 certification overview.
If you are new to the credential itself, what H1 certification is explains exactly which ASE test we mean and why it should not be confused with other credentials that share the "H1" label. Everything in this article refers only to ASE's Transit Bus Certification - H1 Compressed Natural Gas (CNG) Engines test.
Frequently Asked Questions
A single initial H1 attempt costs $62 for the test plus a $34 registration fee per order, totaling $96 before applicable tax. ASE does not publish a separate member or non-member price.
No. The $34 registration is charged once per order, and a single order can contain more than one test. Bundling tests in one order avoids paying registration repeatedly, though you must test within 90 days of purchase.
Recertification uses the same general-test fee schedule, with recertification test fees capped at $186 per order. Adding the $34 registration, the maximum total is $220 before applicable tax. A single H1R is usually well under that ceiling.
You must wait 30 full days after a pass or fail result before purchasing and scheduling the same test again, and you pay the fees again. A second single-test purchase is another $96 before tax.
No mandatory H1 prep course exists, and ASE's official paid practice test list does not include H1. The free Official ASE Study Guide: ASE Transit Bus Tests supplies the task list and official sample questions, so start there before spending anything.