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There is no single service interval for every mechanical chronograph. Follow the guidance for your exact watch model: published manufacturer recommendations range from five years to approximately ten years, depending on the brand and, in some cases, how the watch is used. Water-resistance checks are separate and may be needed more often than a full movement service.
Manufacturer service intervals vary
These are manufacturer recommendations, not a universal industry schedule or proof that one interval suits every chronograph. The figures below refer to complete service unless the table specifies a water-resistance check.
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| Brand or guidance | Complete service recommendation | Water-resistance check | Use conditions or earlier-assessment guidance |
|---|---|---|---|
| TAG Heuer, general service guidance | Every five years. The current US service page does not state a publication year. TAG Heuer complete service | Not stated on this page. | See the model-specific guide for wear and condition factors. |
| TAG Heuer Calibre 16 guide | Usually every five to six years; the guide is indicated as approximately 2024. TAG Heuer Calibre 16 user guide | Every two years for watches worn in water. | The optimal cycle depends on wearing habits, frequency of wear, environment, and physical activity. Deviations in regular performance are a reason to entrust the watch for service. |
| Longines | Every six to eight years. The current service guidance does not state a publication year. Longines service guidance | Not stated in the cited guidance. | The service process begins with a watchmaker diagnosing why service is needed. |
| Rolex | Approximately every ten years, depending on model and real-life usage. The current FAQ does not state a publication year. Rolex service FAQ | Not stated in the cited guidance. | The recommendation varies with model and real-life use. |
| Omega | Every five to eight years. The current FAQ does not state a publication year. Omega service FAQ | Once a year. | Not stated in the cited guidance. |
What a full service involves
A complete service is more than checking whether the watch is keeping time. TAG Heuer describes its full service as movement disassembly and overhaul, replacement of worn components, ultrasonic cleaning of the case, and restoration of sealing. Longines likewise describes its process as beginning with a watchmaker’s diagnosis before case and movement disassembly.
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Water resistance depends on seals as well as the movement. TAG Heuer’s Calibre 16 guide recommends testing every two years for watches worn in water, noting that gaskets age and can corrode with water exposure. Omega recommends a check once a year. These are separate recommendations from complete-service intervals; use the guidance for your own model and how you expose it to water.
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When not to wait for the calendar interval
If timekeeping changes, the chronograph function deviates, or the watch’s regular performance is no longer normal, seek a professional assessment rather than waiting for the next scheduled service date. TAG Heuer’s Calibre 16 guide specifically identifies deviations in regular performance as a reason to entrust the watch for service.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to choose the right interval for your watch
- Identify the exact brand and model, and consult its manual or the manufacturer’s service guidance; a general brand recommendation may not cover every caliber or use case.
- Consider how often and in what conditions you wear the watch, including exposure to water. The TAG Heuer Calibre 16 guide explicitly includes wearing habits, environment, and physical activity as factors.
- Keep water-resistance testing on its own schedule instead of assuming it is covered by a movement overhaul.
- Ask an authorized service center or a watchmaker qualified for the movement to assess the watch if its operation or performance changes.
Without the model, caliber, service history, and current condition, an exact interval for a particular watch cannot be determined from brand-wide guidance alone.
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