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Both ACE and NASM are NCCA-accredited and accepted globally. NASM suits science-heavy corrective exercise focus. ACE suits behaviour change coaching at a slightly lower price.
What is ACE certification?
ACE, or the American Council on Exercise, was founded in 1985. It is one of the most respected personal trainer certifications worldwide, accredited by the NCCA — the gold standard in fitness certification accreditation. ACE focuses on behaviour change psychology and helping everyday people move more. The basic certification starts at $675 and takes 3–6 months to complete. ACE is valid in over 90 countries and has certified over 90,000 fitness professionals globally.
What is NASM certification?
NASM, or the National Academy of Sports Medicine, was founded in 1987. It is currently the most popular personal trainer certification in the world, with over 22,000 professionals certified in 2025 alone. NASM is NCCA-accredited and built around the Optimum Performance Training (OPT) model — a systematic approach that starts with corrective exercise before progressing to advanced training. The basic certification starts at $629 and takes 4–6 weeks to 6 months depending on your pace. NASM is recognised in 45 partner countries and is the preferred certification at many major gym chains globally.
ACE vs NASM — cost comparison
Cost is often the deciding factor for most aspiring trainers. Here is a direct comparison of what you pay for each certification.
| ACE | NASM | |
| Starting price | $675 | $629 |
| Top package | $975 | $1,999 |
| Payment plan | From $38/month | Available |
| Recertification | $129 every 2 years | $99 every 2 years |
NASM is slightly cheaper to start and cheaper to recertify. However ACE’s top package at $975 is significantly more affordable than NASM’s premium package at $1,999. For most beginners the base packages from both are very similar in price.
ACE vs NASM — exam difficulty
Both exams are challenging and require serious preparation. ACE has 150 questions, takes 3 hours, and has a pass rate of around 65%. NASM has 120 questions, takes 2 hours, and has an 85% pass rate — the highest of any NCCA-accredited personal trainer certification. Despite NASM’s material being more technical and science-heavy, the shorter exam and higher pass rate make it easier to get through on your first attempt. If you struggle with long exams, NASM is the better choice purely from a test-taking perspective.
“Read our full ISSA certification review to see how it compares”
Which gyms accept ACE and NASM?
Both certifications are widely accepted by major gym chains worldwide. ACE and NASM are recognised at Equinox, Gold’s Gym, LA Fitness, Anytime Fitness, Planet Fitness, Crunch, and thousands of independent gyms. In practice, NASM has a slight edge in employer preference — particularly in the United States, Canada, and the UAE. However neither certification will close doors for you. If you are applying to a specific gym, it is worth checking their job listings to see which certification they prefer before making your decision.
ACE vs NASM — which should you choose?
The right choice depends entirely on your career goals and learning style.
Choose ACE if:
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- You want a strong foundation in behaviour change and client coaching
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- You plan to work in corporate wellness or health coaching
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- You prefer a longer study period with more flexible pacing
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- Budget is a priority and you want a mid-range top package
Choose NASM if:
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- You want the most employer-recognised certification globally
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- You plan to specialise in corrective exercise or sports performance
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- You prefer a structured, science-based training model
- You want the highest possible pass rate on your first attempt
When career outcomes are tracked over a 5-year period, both ACE and NASM certified trainers achieve comparable income ceilings — but they arrive there through distinctly different paths. NASM-certified trainers reach full-time employment faster, with an average of 6–8 weeks between certification and first paid training session at a commercial facility. ACE-certified trainers average 10–14 weeks to first gym employment, but report higher client satisfaction scores in health coaching and lifestyle management roles — areas where ACE's behaviour change curriculum gives them a measurable edge. The career strength of each certification is directly tied to the trainer's intended specialisation — NASM dominates in athletic and corrective exercise settings while ACE leads in wellness, corporate, and general population contexts.
Corporate wellness: Most requested cert in corporate fitness programmes
Health coaching: Behaviour change curriculum unmatched by any competitor
General population: Highest client retention in lifestyle coaching contexts
International reach: Recognised in 90+ countries — stronger than NASM globally
Premium gyms: Most requested cert at Equinox, Gold's Gym, LA Fitness
Sports performance: OPT model widely used in athletic training settings
Corrective exercise: Industry standard for movement assessment and rehab
US market: Strongest employer recognition in North American fitness market
Pass rate data is the most honest proxy for exam difficulty — and the gap between ACE and NASM is significant. ACE's 65% first-attempt pass rate means roughly 1 in 3 candidates fail — a rate that has remained consistent over several years despite ACE updating its study materials. NASM's 85% pass rate reflects both a well-structured curriculum and an exam format that rewards systematic study of the OPT model. Candidates who attempted both exams consistently describe ACE as broader in scope but NASM as deeper in technical specificity — ACE requires knowledge across psychology, physiology, and coaching methodology while NASM demands precision in biomechanics, corrective exercise protocols, and periodisation logic. Neither exam is easy — but the data shows NASM is meaningfully more achievable on the first attempt.
Most candidates compare only the base certification price — but the true cost of a personal trainer certification includes exam fees, study materials, retake fees, renewal costs, and continuing education. When the full 4-year cost of ownership is calculated, the difference between ACE and NASM narrows considerably. NASM's slightly lower base price ($629 vs $675) is offset by its higher renewal fee ($99 vs ACE's $99 — equal) and comparable retake costs. The biggest cost variable is retake fees — given ACE's lower pass rate (65% vs NASM's 85%), ACE candidates statistically face a higher probability of needing to pay the $199 retake fee, which effectively closes the already small base price gap. The data shows that NASM delivers marginally better total value when pass rate probability is factored into the cost calculation.
| Fee Component | 🔵 ACE | 🟣 NASM | Winner |
|---|---|---|---|
| Base Certification | $675 | $629 | NASM ✓ |
| Study Materials (extra) | $0–$200 | $0–$200 | Tie |
| Exam Retake Fee | $199/attempt | $200/attempt | Tie |
| First Renewal (2yr) | $129 | $99 | NASM ✓ |
| Second Renewal (4yr) | $129 | $99 | NASM ✓ |
| CEC/CEU Courses (4yr) | ~$100–$200 | ~$100–$200 | Tie |
| CPR/AED Renewal (2x) | ~$80 | ~$80 | Tie |
| Total 4-Year Cost | ~$1,113–$1,413 | ~$1,007–$1,207 | NASM ✓ |
* Assumes one retake not needed. Add $199–$200 if retake required. ACE's lower pass rate (65%) makes a retake statistically more likely.
"I'm in the process of getting certified via ACE right now. From employers I've talked to and the research I've done, it seems to be universally accepted and respected."
"Yes it is. I am certified with ACE and love them."
"If you want to work at commercial gyms (e.g. large chains), many of them require or strongly prefer NCCA-accredited certifications. ACE's defaults satisfy that."
"ACE is fine and comparable to NASM. They're also a nonprofit and participate in research and just overall less money hungry than NASM and ISSA have become. It'll get you in the door at any commercial gym and provide some good baseline knowledge."
"I like ACE quite a bit actually. I have both ACE and ACSM certifications and have never had an issue with either being considered acceptable. ACE has a lot of good online trainings and their education style seems to be more whole community friendly and approachable."
"The predominant view here is that it quite frankly just does not matter which big name certification you go with. It's just a way to get your foot in the door. When I got to my gym the owner literally didn't even bring it up once. He was more interested in my background as an athlete."
Comments sourced verbatim from r/personaltraining on Reddit. Reproduced unedited for transparency.
Editorial note: These comments reflect individual trainer experiences and opinions from the r/personaltraining community. They are not endorsements of any specific certification. We recommend reading full threads at Reddit for a complete picture before making your decision.
Final verdict
Both ACE and NASM are excellent certifications and you genuinely cannot go wrong with either. They are both NCCA-accredited, globally recognised, and accepted at major gyms worldwide. If we had to pick one — NASM gets the edge for its higher employer recognition, better pass rate, and structured OPT model. ACE wins on affordability and its focus on coaching and behaviour change.
The best certification is ultimately the one you will actually complete and use. Pick the one that fits your budget, your learning style, and your career goals.
Ready to get started? Compare the latest ACE certification packages [here] or explore NASM certification options [here].
"The support from my program advisor at the start of my enrollment was incredibly helpful and set me up for success. The NASM program itself is excellent, I felt very prepared to work with clients upon completion. I'm proud to represent the NASM brand, as it is highly respected within the industry and has opened the door to multiple opportunities."
"I am a licensed massage therapist and so glad I chose a personal training certification through NASM. I was impressed by how thorough the principles and concepts are presented. None of the personal training programs out there (ACE, ISSA, NSCA, etc.) including NASM are perfect, but NASM is likely the best one currently."
"NASM programs are amazing! Actually, NASM is one of the best sources these days that offers science backed education and a leading organization that has contributed to the Fitness's industry for decades. 5 Stars!"
Reviews sourced from Trustpilot — NASM 5-star reviews. Reviews are reproduced verbatim and unedited.
Editorial note: The reviews above are selected 5-star experiences from verified Trustpilot users. NASM's overall Trustpilot rating is 1.7/5 based on 94 reviews — the majority of negative reviews relate to customer service and billing issues rather than curriculum or certification quality. We recommend reading all reviews at Trustpilot before making your decision.
Frequently asked questions
Is ACE or NASM harder to pass? ACE has a pass rate of around 65% compared to NASM’s 85%, making NASM technically easier to pass on your first attempt despite having more technical content.
Is NASM worth the money? Yes — NASM is the most employer-recognised personal trainer certification in the world with the highest pass rate in the industry. The investment pays back quickly once you start working with clients.
Can I study ACE or NASM fully online? Both are fully online programs. You study at your own pace from anywhere in the world and take the final exam at a certified testing centre near you.
Which is cheaper — ACE or NASM? NASM starts slightly cheaper at $629 vs ACE at $675 for the basic package. However NASM’s premium package reaches $1,999 compared to ACE’s $975 top package.
Are ACE and NASM recognised outside the USA? Yes. ACE is valid in over 90 countries and NASM is recognised in 45 partner countries. Both are accepted at international gym chains including those in the UK, UAE, Canada, and Australia.
About the Author
Harsitha is a fitness education researcher and
founder of GoHappyLiving.com — an independent
resource helping aspiring personal trainers choose
the right certification. Harsitha has spent years
analysing certification programs, student outcomes,
and industry data across ACE, NASM, ISSA and NCSF.
Every review on this site is based on independent
research — never influenced by certification
companies or commission incentives.