KMS activation is permanent in practice — it renews automatically every 7 days with no visible expiry. Here's exactly how the renewal cycle works.
Direct Answer
KMS activation is permanently active as long as the local KMS service runs. It renews every 7 days automatically — you will never see an expiry prompt or activation watermark.
| Event | Timeline | What Happens |
|---|---|---|
| Initial activation | Day 0 | Windows activated for 180 days |
| Auto-renewal | Every 7 days | KMS service silently resets the 180-day clock |
| Service stopped | Day 0 of outage | 180-day clock starts counting down (no notification yet) |
| Notification begins | After 150 days without renewal | Windows shows "Activate Windows" watermark |
| Re-activation | Any time | Run KMSPico or slmgr /ato — instant fix |
| Feature | KMS Activation | Digital License |
|---|---|---|
| Effective duration | Permanent (auto-renew) | Permanent |
| Microsoft account required | No | Yes (recommended) |
| Hardware-tied | No | Yes |
| Internet required | No | Yes (initial) |
| Cost | Free | Free (if eligible) |
The honest answer: it's permanent in practice, through a renewal cycle. A KMS activation is valid for 180 days. Long before that runs out, Windows automatically attempts to renew it, resetting the counter. So as long as the local KMS service is in place, the cycle repeats indefinitely and you never see an expiry prompt.
When you activate with KMSPico, it installs a small scheduled task that re-applies activation on a regular basis. That's what keeps the 180-day window from ever closing. In everyday use the PC simply stays activated — you don't have to do anything.
Only if the renewal mechanism is removed and the machine then sits past the 180-day mark without re-activating — for example, a PC that's wiped of the tool and left off for months. Re-running activation fixes it instantly. For how this differs from a true permanent licence, see KMS vs digital licence.
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