Electroconvulsive therapy (ECT) works better than transcranial magnetic stimulation (TMS) on average, and TMS is the gentler of the two. At Mind Medicine Law, we report what the clinical evidence supports for depression treatments. For this pair, that evidence is guidance from the National Institute of Mental Health (NIMH) plus two published reviews of head-to-head trials. In the TMS vs ECT decision, the severity of the depression, the urgency of relief and tolerance for memory side effects decide which one fits.
Both treatments usually come after several antidepressant trials have failed. ECT needs general anesthesia at every session and usually acts within the first week, while TMS is an awake office visit repeated five days a week for 4 to 6 weeks.
TMS vs ECT: Quick Comparison
| Factor | TMS | ECT |
|---|---|---|
| How it works | An electromagnet sends repeated low-intensity pulses to a targeted brain site. | An electric current induces seizure activity in the brain lasting under a minute. |
| Anesthesia | None. The patient stays awake and can drive home after each session. | General anesthesia and a muscle relaxant at every session. The patient cannot drive home and needs a companion. |
| Sessions and time | Five days a week for 4 to 6 weeks, typically 20 to 36 sessions of 20 to 40 minutes. Accelerated protocols run multiple sessions a day. | About three times a week, usually 6 to 12 treatments, each with fasting, an intravenous line and several hours of recovery. |
| Speed of response | Weeks-long response curve across the daily course. | Usually within the first week, faster than antidepressant medication (NIMH). |
| Reported response and remission | 48.7% response and 32.2% remission for high-frequency rTMS (2025 BJPsych Open review). | 64.4% response and 53% remission (2025 BJPsych Open review). |
| Memory and main side effects | Mild headache, brief lightheadedness, scalp discomfort, facial or jaw contractions. NIMH lists no memory loss. Seizure is a rare risk. | Headaches, upset stomach, muscle aches, confusion and memory loss, mostly for memories around treatment time. Unilateral placement lowers memory risk. |
| Food and Drug Administration (FDA) status | First rTMS device cleared in 2008 after at least one failed antidepressant. Cleared in March 2024 as add-on treatment for adolescents 15 and older. | Cleared for severe depressive episodes in people 13 and older with depression or bipolar disorder. |
| Insurance coverage | Covered by most plans after two failed antidepressants. | Covered by Medicare and most commercial plans for severe or treatment-resistant depression. |
Response and Remission in TMS vs ECT Reviews
ECT outperforms TMS in both reviews summarized here, a 2014 meta-analysis and a 2025 conference abstract. A 2014 systematic review and meta-analysis by Beppe Micallef-Trigona in Depression Research and Treatment combined nine randomized trials with 384 participants, published from 2000 to 2011. ECT lowered scores on the Hamilton Depression Rating Scale (HDRS) by an average of 15.42 points, against 9.3 points for repetitive TMS (rTMS), the name research papers use for the treatment.
The difference works out to 6.12 points in favor of ECT (15.42 minus 9.3), with a P value of 0.011. Average effect sizes, measured as Hedges' g, were 2.14 for ECT and 1.33 for rTMS. Micallef-Trigona listed small samples, no sham controls and no blinding as limits on the findings.
A 2025 systematic review by Zara Thurstan and Declan Hyland was published in BJPsych Open as a conference abstract from the Royal College of Psychiatrists International Congress. It retrieved 170 articles and found six studies that compared ECT and TMS directly. It reported a 64.4% response rate and a 53% remission rate for ECT, against 48.7% and 32.2% for high-frequency rTMS. Low-frequency rTMS reached a 20% response rate.
For psychotic depression, the same abstract reported a 58.8% reduction in HDRS scores with ECT and a 38% reduction with TMS. The authors called ECT the most effective short-term treatment and described TMS, especially bilateral rTMS, as a less invasive option with better tolerability. The abstract's results also show lower dropout with bilateral rTMS, and the authors recommended personalized treatment that weighs severity, patient preference and available resources.
The two reviews differ in outcome measures and study sets. They agree that ECT comes out ahead on average, but the size of that gap remains uncertain. Both summarize mostly small and older trials, and the 2025 review is a conference abstract instead of a full peer-reviewed article. NIMH calls ECT the "gold standard" for treatment-resistant depression and says rTMS "does not match the therapeutic effects of ECT." NIMH also states that strong clinical evidence supports TMS for reducing depressive symptoms.
How ECT and TMS Are Delivered
ECT is given under general anesthesia in a hospital or specialized outpatient surgical suite, while TMS is given to an awake patient in a clinic or office. NIMH describes ECT as "a noninvasive procedure that treats serious mental disorders by using an electric current to induce seizure activity in the brain." The seizure lasts under a minute, and the general anesthesia and muscle relaxant mean the patient feels no pain and does not convulse.
Each ECT visit requires fasting beforehand, an intravenous line and several hours of recovery, with continuous cardiac and respiratory monitoring during the session. The patient cannot drive home, so a companion has to come to every appointment. A typical course runs about three times a week until symptoms improve, usually 6 to 12 treatments, which works out to roughly 2 to 4 weeks.
ECT relief arrives early in that course. NIMH says ECT works faster than antidepressant medication, usually within the first week. Follow-up treatment is usually needed to sustain the improvement, and many patients receive maintenance sessions to prevent relapse.
TMS uses an electromagnet to send repeated low-intensity pulses to a targeted spot in the brain, with no anesthesia at all. NIMH describes a typical course as daily sessions five days a week for 4 to 6 weeks, each lasting roughly 3 to 40 minutes depending on the protocol. Our ECT alternatives guide puts a standard course at 20 to 36 sessions of 20 to 40 minutes.
TMS patients stay awake and can drive themselves home after each session. Accelerated protocols, which NIMH also describes, deliver multiple sessions in a single day. ECT asks for several hours and a companion at each of 6 to 12 visits, and standard TMS asks for a visit on most weekdays for 4 to 6 weeks.
Memory Loss and Side Effects in TMS vs ECT
NIMH lists memory loss as a side effect of ECT and does not list it for TMS.
The common ECT side effects NIMH names are headaches, upset stomach, muscle aches, memory loss and confusion. Memory loss is most common for memories from around the time of treatment. Unilateral electrode placement carries a lower risk of memory loss than bilateral placement.
How long ECT memory effects last differs from person to person. Research by Sackeim and colleagues in Neuropsychopharmacology in 2007 and by the UK ECT Review Group in The Lancet in 2003 found the problems are temporary for some people and persistent for others. The extent depends on the person, the electrical dose and where the electrodes are placed.
Retrograde amnesia means losing memories of events that happened before the treatment. If you or someone you care for is weighing ECT, ask the psychiatrist whether unilateral placement is an option and how the electrical dose will be set.
NIMH lists the TMS side effects as mild headache or brief lightheadedness, scalp discomfort, and contractions of facial or jaw muscles. It calls rTMS "safe and well tolerated," though it notes that long-term side effects have not been determined. Seizure is a rare risk with TMS.
Who Should Choose ECT or TMS
ECT fits severe, psychotic or urgent depression, and TMS fits treatment-resistant depression in people who can wait several weeks for relief. The FDA has cleared ECT for severe depressive episodes in people 13 and older with depression or bipolar disorder. NIMH says typical ECT candidates have severe, treatment-resistant depression or need a fast response because of life-threatening circumstances such as catatonia, suicidality or malnutrition.
TMS works over weeks, and that response curve may be too slow for depression with psychotic features or acute suicide risk. Those are the situations where psychiatrists usually turn to ECT. The psychotic-depression figures from the 2025 review, a 58.8% drop in HDRS scores for ECT against 38% for TMS, also favor ECT.
The FDA cleared the first rTMS device in 2008 for people who had not responded to at least one antidepressant in the current episode. In March 2024 it cleared rTMS as an add-on treatment for depression in adolescents 15 and older. TMS suits people who want to avoid anesthesia and the memory side effects tied to ECT, and who can reach a clinic most weekdays for 4 to 6 weeks.
A history of seizures, or certain metal implants near the head, can rule TMS out. Anyone who cannot attend daily visits for 4 to 6 weeks is a poor fit for standard TMS. Anyone who cannot arrange a companion for every session is a poor fit for ECT, because the patient cannot drive home.
Insurance and Access for TMS vs ECT
Medicare and commercial insurance widely cover ECT for severe and treatment-resistant depression, and most commercial plans and Medicare cover TMS after a person has failed two antidepressant medications. People who pay for a TMS course out of pocket can face several thousand dollars.
No price for either treatment appears in the sources used here. Ask the clinic and the insurer for a written estimate before the first session, and ask whether it includes anesthesia for ECT and the full session count for TMS.
Both treatments usually come after medication has failed more than once. The Sequenced Treatment Alternatives to Relieve Depression (STAR*D) study by Rush and colleagues in 2006 found that roughly half of people who try a first selective serotonin reuptake inhibitor (SSRI) do not reach full remission. Remission rates fall at each later medication step, which is why psychiatrists usually consider TMS and ECT after several medication trials.
An accelerated form of TMS from Stanford (Cole and colleagues, American Journal of Psychiatry, 2020) delivers 10 short sessions a day across several consecutive days. Small trials reported response and remission rates above 80 percent. It is not yet widely available in community clinics, so ask any TMS provider whether they offer an accelerated schedule.
Ketamine and esketamine (Spravato) are other options for treatment-resistant depression. A 2023 New England Journal of Medicine trial by Anand and colleagues found intravenous ketamine noninferior to ECT for nonpsychotic treatment-resistant depression. Our ketamine vs ECT and ketamine vs TMS guides cover those comparisons.
Who This Comparison Is Not For
Three groups need a different first step from the ECT and TMS evidence.
If you are in a mental health crisis in the US, call or text 988 now.
Anyone hoping to pick between ECT and TMS without a psychiatrist should book a psychiatric evaluation first, because the choice depends on psychotic features, suicide risk, seizure history and implants. Anyone looking for a psychedelic option should read our TMS alternatives guide.
What Would Change the Answer
Four conditions would shift the general reading that ECT is stronger and TMS gentler.
Psychotic features or acute suicide risk move the answer firmly to ECT, because TMS takes weeks to work. A seizure disorder or metal implants near the head rule TMS out and leave ECT or another option on the table.
A person who responded to TMS in an earlier episode may reasonably start there again. New head-to-head trials with sham controls and blinding would show more clearly how large the ECT advantage is.
Verdict: TMS vs ECT
Our reading of the two published reviews and NIMH guidance is that ECT is the stronger treatment and TMS the gentler one. Choose ECT when depression is severe, psychotic or urgent, including catatonia, suicidality or malnutrition, because it usually acts within the first week and posts higher response and remission rates. Choose TMS when the person can attend daily visits for 4 to 6 weeks and wants to avoid anesthesia, a companion at every session and the memory risk tied to ECT.
Make the decision with a psychiatrist, and in a crisis, call or text 988 before anything else. To see where TMS vs ECT fits in a specific treatment history, run the depression treatment path tool and bring the result to that psychiatrist.
Frequently asked questions
Is TMS as effective as ECT?
No, ECT works better than TMS on average. The 2025 BJPsych Open review reported a 64.4% response rate and 53% remission rate for ECT, against 48.7% and 32.2% for high-frequency rTMS. NIMH says strong clinical evidence supports TMS for reducing depressive symptoms. TMS needs no anesthesia, and NIMH does not list memory loss among its side effects.
Is TMS less effective than ECT?
Yes, TMS is less effective than ECT on average. The 2014 meta-analysis in Depression Research and Treatment found a 15.42-point drop on the Hamilton Depression Rating Scale with ECT against 9.3 points with rTMS. NIMH says rTMS does not match the therapeutic effects of ECT. Both reviews draw on mostly small and older trials, so the direction is consistent while the exact size of the gap is uncertain.
When is ECT typically used?
ECT is typically used for severe, treatment-resistant depression or when a fast response is needed because of life-threatening circumstances such as catatonia, suicidality or malnutrition. Psychiatrists usually turn to it for depression with psychotic features or acute suicide risk, since TMS takes weeks to work. The FDA has cleared ECT for severe depressive episodes in people 13 and older with depression or bipolar disorder.
Does TMS cause memory loss like ECT?
NIMH does not list memory loss as a side effect of TMS. Its listed TMS side effects are mild headache or brief lightheadedness, scalp discomfort, and facial or jaw muscle contractions, though long-term side effects have not been determined. ECT does carry memory risk, most often for memories around the time of treatment, and unilateral electrode placement carries a lower risk than bilateral placement.
How many sessions of TMS and ECT are needed?
ECT usually takes 6 to 12 treatments given about three times a week, and NIMH says follow-up treatment is usually needed to sustain the improvement. Standard TMS runs daily sessions five days a week for 4 to 6 weeks, typically 20 to 36 sessions of 20 to 40 minutes. Accelerated TMS delivers 10 short sessions a day across several consecutive days.
Does insurance cover TMS and ECT?
Yes, insurance covers both, under different rules. Medicare and commercial insurance widely cover ECT for severe and treatment-resistant depression, and most commercial plans and Medicare cover TMS after two failed antidepressants. No price for either treatment appears in the sources used here, so ask the clinic and the insurer for a written estimate before starting.