Panama Canal Drops to 32 Daily Slots and Suspends Last-Minute Booking

The Panama Canal Authority’s August 20 advisories do two things. They reduce daily booking slots to 32 from September 15, and they tighten the rules around how transit slots are allocated, retained and recovered.

The slot cut is the headline. The more operationally important change for many shippers is what happens if a vessel has to compete for a slot or loses one it already had.

Two advisories, two different jobs

Advisory	What it changes
A-28-2026 August 20, 2026	Booking and auction rules: • selected auction slots may be offered by market segment group • one slot per customer per day during competition • Neopanamax priority based on TEU capacity • Last-Minute service suspended • late cancellation surcharge from September 1 • Customer Ranking frozen from September 1 • In-Transit Time set to 48 hours from September 4
A-29-2026 August 20, 2026	Capacity and draft changes: • 34 daily booking slots for booking dates beginning September 4 • 32 daily booking slots for booking dates beginning September 15 • Neopanamax draft adjustments postponed

Source: Panama Canal Authority Advisories to Shipping A-28-2026 and A-29-2026.

Read together, the two advisories show both the capacity available in September and the tighter conditions carriers face when trying to secure or recover a booking.

The September 4 change already matters for containerships

A-29 sets total daily booking availability at 34 slots for booking dates beginning September 4. The next reduction comes for booking dates beginning September 15, when the total falls to 32.

Both slots removed in the September 15 step come from the Panamax Super allocation, which falls from 20 to 18. Neopanamax remains at nine in both A-29 tables.

But container operators should not read that as meaning Neopanamax access is unchanged. The September 4 configuration already leaves nine Neopanamax booking slots a day, including only one in the Period 2 window from 14 to 8 days before transit. The conditioned Neopanamax slot in that window is unavailable.

The additional September 15 reduction therefore lands on Panamax traffic, while the container-specific issue is already embedded in the September 4 allocation and the new rules governing competition for those Neopanamax slots.

The recovery options are narrower now

Last-Minute service is suspended until further notice. A vessel that forfeits its slot must obtain a new reservation if it wants another guaranteed transit date rather than rescheduling against the old booking.

Flexibility services may be narrowed for all customers. ACP names date changes, transit in advance and substitutions specifically. Deferrals and advance services for LoTSA program customers may also be limited.

The transit conditions changes table in Notice to Shipping N-07 does not apply until further notice. One of the references operators normally use to anticipate booking-condition changes is therefore suspended for now.

From September 1, a late cancellation surcharge applies under tariff number 1050.IBC9, in addition to the applicable cancellation fee. It triggers when a booking is cancelled seven days or less before the required arrival time and the vessel does not reach canal waters within seven days of the original booking date.

From September 1, the Customer Ranking is frozen. The ranking published that day stays in effect unchanged until further notice, which means subsequent operating performance will not move a customer’s position in ranking-based tiebreaks while the freeze remains in place.

From September 4, In-Transit Time is set at 48 hours for all booked vessels. A booked vessel arriving at the first set of locks the day before its reserved transit date is treated as compliant if it clears the last set of locks before 2400 on the day after that date.

Canal Waters Time averaged 25.38 hours in July, with a high of 41.13. But a vessel that forfeits a reservation does not simply keep the same guaranteed place in line. It must secure another reservation to regain a confirmed transit date. Without one, it falls back to ordinary unreserved transit, where ACP warns that delays may be indefinite.

If your October sailings route through Panama and you need to know the moment a booked transit slips rather than when the discharge terminal tells you, walk through how ops teams set exception alerts across carriers in one view.

Where the slots actually sit

A-29 publishes the daily allocation by vessel category and booking window. The lead times matter as much as the totals, because they show how little availability remains close to transit.

Booking window	Lead time before transit	Neopanamax	Supers	Regulars	Total
Special Period	730 to 366 days	1	3	2	6
LoTSA	Over 90 days	3	—	—	3
Period 1	90 to 31 days	—	6	1	7
Period 1A	30 to 15 days	3	—	—	3
Period 2	14 to 8 days	1	10	1	12
Period 3 (auctions)	7 to 2 days	1	1	1	3
Total		9	20	5	34

Daily slot allocation for booking dates beginning September 4, 2026. Source: Panama Canal Authority Advisory to Shipping A-29-2026.

Inside the 14 to 8 day window, the canal offers one Neopanamax slot a day. The conditioned Neopanamax slot in that window is not available. Inside seven days, A-29 allocates three Period 3 auction slots a day across the three vessel categories. Those auction slots have been clearing at figures that make the arithmetic of a missed booking uncomfortable, as recent Neopanamax auction prints have shown.

For booking dates beginning September 15, the Period 2 allocation for Supers falls from 10 to 8, and no more than nine Supers may be booked for transit per direction.

What changes specifically for containerships

Selected auction slots may now be restricted by market segment. From August 21, for booking dates beginning September 4, selected auction slots may be offered to defined groups. Full container vessels sit in Group 3 alongside vehicle carriers, RoRo and refrigerated vessels. Which days each group can bid depends on how many vessels from that group are waiting to transit, as published in the Projected Booking Slots Availability table.

Neopanamax competition favours the largest containerships. Full container vessels with greater maximum TEU capacity receive priority during slot competition, with Customer Ranking used as the tiebreaker. Because the ranking freezes on September 1, that tiebreak remains fixed while the freeze is in effect.

A won slot cannot simply be handed down to a smaller ship. Once assigned, a slot may only be swapped or substituted to a vessel with the same or greater TEU capacity. Customer preferences submitted during allocation carry the same restriction. Lower-capacity Neopanamax containerships are therefore disadvantaged when competing against larger vessels, while operators also lose the option of winning with a larger ship and substituting downward.

One slot per customer per day during competition. A customer already awarded a slot for the same booking date, including through LoTSA and Net Zero, cannot take another unless no other competitors appear. The same restriction also applies when the customer was awarded a slot for the previous booking date. Auction slots sit outside this limit. For Neopanamax vessels, the rule applies to Period 1A from booking date September 20 and Period 2 from September 4. For Regular and Super vessels, it applies to Period 1 from November 19 and Period 2 from September 4.

The dates to work against

September 1: Late cancellation surcharge goes live. Customer Ranking freezes at that day’s publication.
September 2: Neopanamax maximum authorised draft drops to 14.63 metres (48.0 feet) TFW, postponed from August 26.
September 4: 34 daily booking slots for booking dates beginning that day. In-Transit Time set at 48 hours. One-slot-per-customer rule applies to Period 2 across all categories.
September 15: 32 daily booking slots for booking dates beginning that day. Panamax Super Period 2 allocation drops to 8, with no more than nine Supers booked per direction.
October 1: Neopanamax maximum authorised draft drops to 14.48 metres (47.5 feet) TFW, postponed from September 3.

Two things are worth confirming with carriers this week. First, whether Panama-routed strings serving your October sailings still hold the transit bookings assumed in their schedules or move to an alternative rotation. Second, whether the October 1 draft step affects the loading position of cargo already committed on Neopanamax services.

Treat September as a setting, not a settled state

Cumulative rainfall across the canal watershed ran 34% below the historical average from May through August, and watershed inflows 44% below. ACP describes that as a substantially reduced hydrologic response despite the rainy season having started. The authority also points to the 2026-2027 El Niño outlook as a risk to rainfall through the remainder of the wet season and identifies the January-to-April 2027 dry season as the horizon it is managing toward.

ACP says it will announce further adjustments as far in advance as circumstances allow, while warning that conditions may change faster than anticipated. The September numbers are the current configuration. For October and November bookings, build contingency for further changes rather than treating those numbers as fixed.