Modify a Reservation (Dates and Guests)

A guest's plans change. They want an extra night, their flight moved, one of the four travellers dropped out, or they're bringing the dog after all. You can change a confirmed, paid reservation in place — dates and guest counts — and Haven settles the price difference with the guest automatically.

You no longer need to cancel and rebook to change a booking. That old workaround refunded the guest, released their dates to the open market, and made them pay again at whatever your rates are today. Modifying keeps the reservation, keeps its original pricing, and charges or refunds only the difference.

What You Can Change

Check-in and check-out dates — extend, shorten, or move the stay entirely
Adults
Children
Infants
Pets

Everything else about the booking stays as it is. To change what the guest pays without changing the stay itself, use Issue refund (after payment) or Adjust price (before payment).

How to Modify a Booking

Open the reservation — from Home → Overview → Inbox, the calendar, or the confirmation email link.
Click Modify reservation. It sits with Cancel Reservation and Issue refund. You can also click the Dates or Guests chip at the top of the reservation — both open the same dialog.
Pick the new dates, and use the steppers for adults, children, infants and pets.
Read the price panel. It updates as you type and shows the old total, the new total, the difference, and exactly what will happen to the money.
Click Confirm change.

The guest gets a message on the reservation thread telling them what changed and what it cost, delivered by email and by text if they've opted into stay texts.

How the New Price Is Worked Out

Haven re-prices the stay against the booking's own frozen pricing, not your current settings. The nightly rates, discounts, fees, taxes and cancellation terms the guest agreed to at checkout all still apply. Raising your rates after a booking is confirmed can never retroactively re-price it.

The one exception is nights the booking never covered. An extra night at the end of a stay has no agreed price, so it's priced at your current calendar rate for that date — including any seasonal rate or price override you've since set. The price panel breaks this out per night so you can see exactly what an added night costs before you confirm.

Everything else recomputes off the frozen terms: taxes are recalculated on the new base using the tax rules captured at booking, per-night and per-guest fees re-multiply against the new stay length and party size, and pet fees apply at the rate on the booking.

What Happens to the Money

Situation	What happens
Price goes up and there's a card on file	The difference is charged to the saved card straight away and the change applies immediately
Price goes up and there's no usable card	The guest gets a payment link. The reservation does not change until they pay
Price goes down	The difference is refunded to the guest's original payment method, and your payout drops by the same amount
No price change (infants and children don't price on most listings)	The change applies immediately, no charge, no refund

Most bookings have no saved card — Haven only keeps one when checkout asked for it, typically for a security deposit hold. So a change that costs the guest more will usually take the payment-link route rather than charging silently. A card that does exist can also decline or ask for 3-D Secure verification, which lands in the same place.

Any increase in price is added to your payout for that booking; any decrease comes out of it. If that booking's payout has already gone out, the difference settles separately rather than amending a payout that's already been released. See Scheduled Payouts.

When a Change Is Waiting on the Guest

When the guest needs to pay, the reservation shows a Change waiting on the guest card with the pending dates, the party, and the amount owed. Until they pay:

The reservation has not changed. The original dates and guest counts still apply everywhere — your calendar, your channels, your cleaners, the guest's guide.
The dates are not held. They stay bookable, and if someone else books them first, the guest's payment is automatically refunded and the change is dropped.
The link expires after 48 hours.

You have two options on that card:

Resend link — re-sends the same link to the guest. It's the same link and the same price, so they can't end up with two live quotes.
Discard change — drops the change and kills the link. Nothing to undo: the booking was never touched.

Modify reservation is hidden while a change is pending, so you can't stack a second change on top of one that's about to land. Discard the pending change first if you've changed your mind about what to offer.

What Gets Rescheduled Automatically

Changing the dates moves everything scheduled around them:

Security deposit hold — the authorization and release times slide onto the new window
Guest emails and the check-in text — the whole schedule is rebuilt on the new dates
Turnover and fulfillment tasks — cleaners and service tasks move with the checkout
Smart lock codes — re-issued for the new window
Thermostat schedules — revoked and re-provisioned
Damage protection — the Truvi coverage window is updated
Calendar sync — pushed to your connected channels and PMS

Changing only the guest counts touches none of that, since the occupancy dates didn't move. Only the calendar and pricing pushes run.

When You Can't Modify a Booking

Modify reservation doesn't appear when:

The booking isn't confirmed — a pending request has no money to settle, so use Adjust price instead
The stay has already ended — its money is settled and the payout may already be out. Use Issue refund for a goodwill gesture after the fact
The booking came from a connected PMS or channel (Guesty, OwnerRez, Hospitable, Lodgify, Airbnb). Those reservations belong to the system that created them — change them there and the update syncs back to Haven. See PMS Integrations Overview

A booking taken on Haven stays modifiable even when it's been pushed out to a connected PMS. Haven updates your availability in the partner after the change, but it does not rewrite the reservation record it created there — so if you keep operational notes in your PMS, update that reservation's dates by hand too.

A stay that's already in progress can still be modified — extending a guest who wants two more nights is the most common reason to use this at all.

What Can Block a Change

The dialog checks the proposed stay the same way a new booking is checked, and tells you which rule it breaks before you can confirm:

The new dates overlap another booking or a blocked period
The stay is shorter than your minimum stay or longer than your maximum stay
Check-in falls outside your advance notice window or on a day your check-in day rules disallow
The party exceeds the listing's maximum guests
The pet count exceeds your maximum pets, or the listing doesn't accept pets

The booking itself is excluded from the conflict check, so extending into your own dates works exactly as you'd expect.

Guests Can't Modify Their Own Reservations

Changes are host-initiated. A guest who wants different dates messages you, and you make the change. That keeps you in control of whether the dates work for your calendar and your cleaners, and stops guests re-pricing a stay themselves.