Everything you need to know about How Long Does TMS Last? Treatment Timeline and Long-Term Results — how it works, what it costs, and how to find a provider who actually knows what they're doing.

When people ask how long TMS therapy lasts, they usually mean one of two things. How long is the treatment itself? Or how long do the results stick around? Both matter, so this guide covers each.

What You’ll Learn

• What the standard TMS treatment course looks like week by week
• How long TMS results typically last
• How maintenance sessions work
• What to do if symptoms return
• The long-term picture for TMS outcomes

The Treatment Course: 6-9 Weeks

A standard course of TMS for depression involves 36 sessions, delivered five days a week over approximately 7 weeks. Some protocols taper at the end. For example, three sessions in the final week instead of five. This can stretch the course to 8 or 9 weeks.

Each individual session takes 20-40 minutes for standard rTMS. If your clinic offers theta burst stimulation (TBS), sessions can be as short as 3 minutes, though you still need to account for setup time and travel.

Here is what the typical timeline looks like:

• Weeks 1-2: Most people feel nothing yet. Some get headaches from the treatment but no mood changes.
• Weeks 3-4: This is when many people start noticing something shifting. Better sleep, more motivation, slightly improved mood.
• Weeks 5-6: The majority of responders see their most significant improvement during this window.
• Weeks 7-9: Taper sessions and wrapping up the course. Some people continue to improve even after the last session.

The most important thing about this timeline: do not quit early. Completing the full course is the single best predictor of a good outcome. People who stop at session 20 because they are not feeling better yet are often walking away right before the treatment would have kicked in.

As we covered in our what TMS feels like guide, mood improvement typically starts around weeks 2-3, often noticed by others before you notice it yourself. Weeks 3-6 is when most responders feel the most significant shift.

How Long Do Results Last?

This is the harder question, and the honest answer is it depends.

For people who respond to TMS, the published data shows:

• Average duration of benefit: 6-12 months
• Some people maintain improvement for over a year without any additional treatment
• About 30-50% of responders will see some return of symptoms within 6-12 months
• A smaller group maintains full remission for years

These numbers come from follow-up studies tracking people after their initial treatment course. The reality is that TMS durability is highly individual. Some people get one round and stay well for years. Others need periodic tune-ups.

Maintenance Sessions

When symptoms start creeping back, the typical approach is maintenance TMS, periodic sessions designed to sustain the initial improvement. This is increasingly common, and most providers now offer it as a standard part of their practice.

Maintenance protocols vary, but common approaches include:

• Once weekly for a month, then taper to biweekly or monthly
• A cluster of sessions (5-10 over 1-2 weeks) when symptoms re-emerge
• Monthly single sessions as a preventive measure

Insurance coverage for maintenance is hit or miss. Some plans cover it, especially with documentation that symptoms have returned. Others do not. Ask your clinic about this upfront so you are not caught off guard.

What to Do if Symptoms Return

If your depression starts coming back after TMS, you have several options:

1. Maintenance sessions as described above. This is the go-to approach for most providers.
2. A full retreatment course. Some people do a second round of 36 sessions. The data suggests that people who responded the first time are likely to respond again.
3. Combining TMS with other treatments. Many people do best with TMS plus ongoing therapy, medication, or lifestyle changes. TMS does not have to stand alone.
4. Adjusting the protocol. Your provider might try a different target, different intensity, or switch from standard rTMS to theta burst (or vice versa).

The key is not to wait until you are fully relapsed. If you notice early signs, sleep disruption, loss of interest, creeping negativity, contact your provider. Catching it early makes retreatment faster and easier.

The Long-Term Picture

TMS has only been FDA-cleared since 2008, so the longest follow-up data we have is about 18 years. What it shows is generally encouraging. For many people, TMS provides a durable reduction in depression severity, especially when paired with other treatments and backed by maintenance sessions when needed.

It is not a permanent fix for most people. But then again, neither is any depression treatment. Antidepressants require ongoing use. Therapy requires ongoing work. TMS requires occasional maintenance. The goal is not a one-time cure. It is sustained management that gives you your life back.