Never miss another maintenance date

Answer

Maintenance dates slip because the tools most small trades use — a spreadsheet and a shared calendar — are silent: they store a date but never calculate the next one and never warn you it is coming. You stop missing dates when three things are true: the next due date is derived from the last service plus the interval, a lead window flags it before it is due, and a specific person owns it. Get those in place and the schedule chases you, instead of you chasing it.

Why maintenance dates slip

It is almost never carelessness. It is the gap between how many recurring dates a growing business carries and what a manual tool can hold in view:

• The list doesn’t recalculate. You finish a service, but the spreadsheet still shows the old date until someone edits the row by hand.
• Nothing is looking ahead. A calendar entry from a year ago does not raise its hand a month before it is due.
• The overview disappears. Past a hundred assets, “what is due in the next four weeks” is no longer a glance — it is an afternoon of scrolling.
• Knowledge lives in one head. When the person who “just knows” the schedule is off sick, the schedule is off sick too.

The result is the call every trades business dreads: the customer noticing the missed service before you did.

The mechanics of a due date you can trust

A reliable schedule rests on one rule, applied consistently: last completed service + interval = next due date. Document a service and that date should roll forward automatically, so the next one is always visible and always correct. There is no manual step where a human has to remember to advance it.

Two details make it robust:

• Keep only the next date live. You do not need ten future dates cluttering the view — you need the next open one per asset, plus a calendar that projects the rest when you want to look ahead.
• Anchor to real history. The first due date should come from the actual last service, not from the day you happened to enter the asset — otherwise the whole schedule is off by months.

The lead window: catch it before it’s late

A due date on its own is still a trap: by the time it arrives, you are already out of runway to plan the visit. A lead window — a set number of days before the due date — turns “due today” into “due soon”, so a job moves from open to due while there is still time to schedule it. Thirty days is a common default; heating work with a seasonal peak often wants more.

The status then tells you the whole story at a glance: open (comfortably ahead), due (inside the lead window — plan it), overdue (past the date — act now). Colour is never the only signal; a clear label carries the same meaning.

Who owns the date

A date nobody owns is a date everybody assumes someone else has. Assign each service to a specific person, and give them a filtered view of just their jobs. In a two-person shop that is trivial; at fifteen people it is the difference between “we cover it” and “I thought you had it”.

Inspection deadlines are their own clock

Statutory checks — a lift’s annual inspection, a fire extinguisher, a smoke alarm — run on legal deadlines that do not depend on any maintenance contract. Track them as their own dates on the asset, with their own lead time, so a legal deadline never hides behind a service interval. This is where a spreadsheet is most dangerous and a watched deadline most valuable.

How Gewerkly helps

Gewerkly turns every interval and inspection deadline into a watched date: it calculates the next due date from the last service, moves a job to due inside your lead window and to overdue the moment it passes, and reminds you by email in good time. You can assign the responsible person, see everything on a dashboard and calendar, and document the work on your phone at the jobsite — it is mobile-web ready, no app to install. See how the reminders and due dates work on the features page.

FAQ

How far ahead should reminders fire?

A 30-day lead is a sensible default — enough time to schedule the visit and order anything you need. Seasonal work, such as heating before winter, often benefits from a longer window, so the lead time should be adjustable.

What is the difference between “due” and “overdue”?

“Due” means the date is inside your lead window — it is time to plan the visit. “Overdue” means the due date has passed without the work being documented — it needs action now, and it should stand out clearly on the dashboard.

Does the next date update itself after a service?

Yes. When you document the completed work, the due date rolls forward by the interval and the next open date appears automatically. You never advance it by hand.

Can I keep legal inspection deadlines separate from services?

Yes, and you should. An inspection deadline is tracked as its own date on the asset, independent of the maintenance interval, so a statutory check never gets buried inside a service schedule.

Sources

• Gewerkly product documentation — due-date calculation, lead window, reminders, statuses and assignment.
• General scheduling practice for recurring maintenance in the building-services trades.

Boilerplate

Gewerkly is the maintenance software for small SHK and building-services trades that keeps any of their customers’ maintenance contracts from slipping through. It calculates every due date, flags it in good time and rolls it forward when the work is done. Try it free for 14 days, no credit card — see pricing.