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A holiday let availability calendar has one job: to show the truth about every night, in every place a guest can book it. That means one calendar that every channel reads from, not a copy on each site. It closes a date everywhere the moment it sells, and it knows your changeover days and minimum stays so it doesn't leave gaps nobody can book. If your calendar does those three things, double bookings stop and the gap nights start selling. If it doesn't, you're maintaining several calendars and hoping they agree.
This guide covers how to set that up for one cottage or a handful, what the calendar on your own website should do, and why, for business rates, the calendar is also your evidence.
Why most holiday lets end up with four calendars
Nobody sets out to run four calendars. It happens one listing at a time.
You start on Airbnb. You add Booking.com for the shoulder season, Vrbo because a friend said families book there, and a calendar on your own website so repeat guests can book direct. Each of those has its own availability calendar. Unless something connects them, you now have four versions of the truth, and the job of keeping them the same is yours.
The usual fix is iCal: each site exports a calendar link, and you import it into every other site. It works, up to a point. The trouble is how quickly the links pile up, because every calendar has to import every other one.
Places you take bookings | iCal links to set up and keep working |
|---|---|
2 | 2 |
3 | 6 |
4 | 12 |
5 | 20 |
That's per property. Three cottages on four channels is 36 links, and none of them tells you when it breaks.
iCal has a timing problem, too. Airbnb's own help centre says its calendar "automatically updates every 3 hours" from the calendars you've connected. For three hours after a booking lands somewhere else, Airbnb can still sell the same week. Our calendar sync guide walks through that window step by step. For the busiest weeks of summer, it's the gap where double bookings happen.
The fix: one calendar, and everything reads from it
The alternative is to stop copying calendars between sites and keep a single calendar that pushes out to each of them. A booking on any channel lands in the master calendar and closes those dates everywhere at once, through a two-way connection rather than a feed that's checked every few hours.
In practice, that means:
One diary with every property on it. Each cottage is a row, dates run across. You see the whole season on one screen, not one property at a time from a dropdown.
Bookings from every channel land automatically. If you're typing Airbnb bookings into a calendar by hand, you have a diary, not a system.
Closing a date closes it everywhere. That covers owner stays, maintenance and a week you've promised to family, as well as bookings.
Rates and minimum stays go out from the same place. iCal only moves blocked dates. It doesn't move prices or stay rules, so with iCal you're still changing them on every site by hand.
Our holiday let booking system guide covers the rest of what that system should do, including payments, deposits and multi-property views.
Changeover days and minimum stays: where the gaps come from
For a holiday cottage, double bookings are only half the problem. The other half is the gap night: two or three nights between stays that your own rules won't let anyone book.
It usually looks like this. A cottage has a three-night minimum in the shoulder season. A family books Saturday to Wednesday, and the next guests arrive Friday. That leaves Wednesday and Thursday: two nights, below your minimum, so no channel will sell them. The cottage sits empty, cleaned and ready.
Worked example. Assumptions for illustration: one cottage at £140 a night, with twelve two-night gaps a year that the three-night minimum blocks.
Per year | |
|---|---|
Nights left unsellable (12 × 2) | 24 |
Revenue at £140 a night | £3,360 |
If half of those gaps sell | £1,680 |
A calendar that handles this properly lets you set rules by date rather than one rule for the year:
Minimum stays by season. Seven nights in August, three in May, two in November.
Changeover days by season. Saturday-only in peak weeks, any day the rest of the year. Saturday-only works in August, when demand fills the weeks. The rest of the year it just turns guests away.
A lower minimum inside short gaps. If a gap is shorter than your minimum, let it sell as a two-night stay rather than not at all.
Back-to-back changeovers flagged. When one guest leaves and the next arrives the same day, your cleaner needs to know days ahead, not on the morning.
Keep the rules simple. Every restriction blocks someone, and a calendar full of them can turn away more bookings than it protects. Our seasonal pricing guide covers the same trade-off for rates.
The calendar on your own website
Guests who have stayed before, or who find you on Google, want to see what's free and book it. A PDF of the season or a calendar you update when you remember doesn't do that. The calendar on your website should:
Read from the same master calendar as every channel, so it's never out of date.
Show the rules, not just the dates. Minimum stay and changeover days visible when a guest picks dates, so they don't choose a week that can't be booked.
Let the guest book, not just enquire. An "enquire now" form means an email, a reply, a wait and often a lost guest. If the dates are free, let them pay a deposit and have it.
Work on a phone. Most people planning a holiday look on their phone first.
Every direct booking is one that doesn't pay OTA commission. Our direct bookings vs OTA commission guide shows what that's worth per stay.
Your calendar is also your business rates evidence
This is the part most owners don't think about until the council writes.
To be assessed for business rates rather than council tax, a self-catering property has to meet day-count tests. They differ across the UK:
Available to let | Actually let | Source | |
|---|---|---|---|
England | 140 nights in 12 months | 70 nights in the same 12 months | GOV.UK (updated 1 April 2026) |
Wales | 252 days | 182 days | Welsh Government (since 1 April 2023) |
Scotland | 140 days in the year | 70 days, counted within the 140 | Scottish councils' guidance |
In England, only short-term lets of under 28 nights count towards the 70 nights actually let. In Wales, the Welsh Government is consulting until 23 October 2026 on changes, including a possible modest cut to the 182-day letting threshold, with any changes intended from 1 April 2027.
Which nights count is exactly what an availability calendar records: nights available, nights let, and nights blocked for your own use. If your calendar is spread across four sites, putting that evidence together means exporting from each one and reconciling them by hand. If it's one calendar, it's one report.
Worked example. An English cottage has been let for 41 nights by the end of September. To reach 70 nights, it needs 29 more let nights within the same 12-month period. If November to February is usually quiet, you'd want to know that now, while there's time to open more winter dates or lower the minimum stay, not next April.
This is a summary of published guidance, not tax advice. The rules are applied by your local council and the valuation office, so check with them or your accountant for your property.
The checklist: eight questions for your calendar
Is there one master calendar, or a copy on each site kept in step by iCal links?
Does a booking on any channel close the dates everywhere through a two-way connection?
Can you see every property on one screen?
Can you set minimum stays and changeover days by date, not just for the whole year?
Can short gaps sell below your usual minimum?
Are back-to-back changeovers flagged for your cleaner in advance?
Can guests book and pay on your own website, from the same calendar?
Can you report nights available, let and blocked for the year without a spreadsheet?
If the answer to 1 and 2 is "iCal", the rest is harder than it needs to be.
FAQ
What is a holiday let availability calendar? It's the calendar that shows which nights each holiday let is free, booked or blocked. It works best as a single master calendar that every booking channel and your own website read from, so a booking anywhere closes those dates everywhere.
How do I sync my holiday let calendar across Airbnb, Booking.com and Vrbo? There are two ways. iCal links copy blocked dates between sites, but every site needs a link to every other one, and they update on a schedule (Airbnb says every 3 hours). A booking system with two-way connections keeps one calendar and pushes changes to every channel as soon as they happen, including rates and minimum stays.
Can I put an availability calendar on my holiday let website? Yes. It should read from the same calendar as your channels, show your minimum stays and changeover days, and let guests book and pay rather than only send an enquiry. A calendar you update by hand will drift out of date.
How do I stop gap nights between holiday let bookings? Set minimum stays and changeover days by season rather than for the whole year, and allow short gaps to sell below your usual minimum. A two-night gap that can't be booked is a cleaned cottage sitting empty.
How many nights does a holiday let need to be let for business rates? In England, a self-catering property must be available to let for 140 nights and actually let for 70 nights in the same 12-month period. In Wales it's 252 days available and 182 days let. In Scotland it's 140 days available and 70 days let. Check with your council or accountant for your property.
Do owner stays count as available nights? No. Nights you block for your own use aren't available to let. Keep them marked as owner stays in your calendar so you can show which nights were genuinely available and which were let.
Stayvieo keeps every holiday let in one diary: every unit and property on one calendar, one inventory pushed to every channel, and dates closed the moment a unit books. Changeover days are visible at a glance, back-to-back departures and arrivals are flagged, and your cleaners get a clear turnover list to follow. From £29 a month excluding VAT, with no commission and no lock-in contract. Try it free for 14 days, no card needed. See how it works for holiday lets.
