BLS certification is valid for two years. Both the American Heart Association (AHA) and the American Red Cross issue cards that expire exactly two years from the date of completion, so you’ll need to renew on that cycle to stay current. The AHA specifies that your card remains valid “through the end of the month” in which it was originally issued, giving you a small buffer at the tail end.
How the Two-Year Cycle Works
If you completed your BLS course on March 15, 2024, your certification is good through the end of March 2026. That end-of-month rule from the AHA means you don’t need to renew on the exact anniversary date, just before the calendar flips to the following month. The Red Cross follows the same two-year validity period.
This two-year window applies regardless of whether you took the full initial provider course or a renewal course. Every time you renew, the clock resets for another two years from your new completion date.
When to Start the Renewal Process
Don’t wait until your card expires. The Red Cross allows you to take a recertification course while your certification is still current or within 30 days of its expiration. If you let it lapse beyond that 30-day window, you’ll typically need to retake the full provider course instead of the shorter renewal version.
A good rule of thumb is to start looking for renewal courses about two to three months before your expiration date. Class availability varies by location, and scheduling a session that fits your work schedule takes time. Many employers require proof of current BLS certification and won’t accept an expired card while you wait for a class opening.
Renewal Course vs. Full Course
The renewal course is slightly shorter than the initial certification. Through the AHA, the full BLS Provider Course runs about 4.5 hours, while the renewal takes roughly 4 hours. Both include hands-on skills practice and testing on manikins, so you’ll still demonstrate chest compressions, rescue breathing, and AED use in person.
The renewal course assumes you already have a foundation in BLS concepts and focuses on refreshing your technique and covering any guideline updates since your last certification. If your card has been expired for more than 30 days (Red Cross) or you’ve let it lapse significantly, you’ll be directed to the full course. Contact your local training center if you’re unsure which version you qualify for.
What You’ll Cover in a Renewal
BLS guidelines are updated periodically, and your renewal course will reflect the most current standards. The 2025 AHA guidelines, for example, introduced several changes that anyone renewing now will need to know. Naloxone (an opioid-reversing medication) is now incorporated into the adult BLS response algorithms. The guidelines also clarify that resuscitation should generally happen where the patient is found, as long as high-quality CPR can be performed safely, and that the patient’s torso should be at approximately the level of the rescuer’s knees during compressions.
These updates are one of the key reasons the two-year renewal cycle exists. CPR science evolves, and techniques that were standard practice a few years ago may be refined or replaced. The renewal course keeps your skills aligned with current evidence.
Your Employer May Expect More Frequent Training
While the certification card itself lasts two years, some workplaces hold their staff to a tighter schedule. OSHA does not mandate a specific retraining frequency for CPR, but its Best Practices Guide recommends that instructor-led retraining for life-threatening emergencies, including CPR and AED use, happen at least annually.
Certain industries have stricter requirements. Workers in permit-required confined spaces, logging operations, electric power generation and distribution, and commercial diving must maintain CPR training under specific OSHA standards. Even in those cases, OSHA supports annual retraining without formally mandating it. Your employer may require yearly refresher sessions, in-house skills checks, or supplemental online modules between your official two-year renewals. Check with your HR department or supervisor to find out if your workplace expects anything beyond the standard cycle.
What Happens if You Let It Expire
An expired BLS card is not valid, period. There is no official grace period that extends your certification beyond its printed expiration date. The Red Cross offers a narrow 30-day window after expiration during which you can still take the shorter recertification course rather than the full one, but your certification is not considered active during that time.
For healthcare professionals, a lapsed BLS certification can create real problems. Hospitals, clinics, and EMS agencies typically require active BLS as a condition of employment or credentialing. Some won’t let you work patient-facing shifts until you provide a current card. Nursing and medical schools also require active certification throughout enrollment, and a gap could delay clinical rotations.
If your card expired months ago, plan on taking the full 4.5-hour provider course. You’ll practice the same skills and receive the same certification card as someone taking BLS for the first time. The upside is that your prior training will make the course feel like a review rather than starting from scratch.