The Definitive Hong Kong Bus Guide for Planning, Paying and Riding Every Bus Type

Three franchised operators hold exclusive geographic route packages, and the Octopus card is the only fare medium accepted on every franchised bus and most public light buses. Once you understand that map and that payment rule, the chaos of a Nathan Road bus stop resolves into a network you can read. This page routes you into the five things you came to do: plan a trip across a franchise boundary, decode a route number, pay without looking like a tourist, choose between a green minibus and a red minibus, and ride a cross-harbour route without overpaying.

• Franchised operators: Kowloon Motor Bus (KMB), Citybus, Long Win Bus, New Lantao Bus (NLB)
• Universal fare medium: Octopus card
• Public light bus types: Green minibus (fixed route, fixed fare) and red minibus (flexible route, variable fare)
• Minibus capacity: 19 seats maximum
• Official journey planner: HKeMobility app and website
• Cross-harbour surcharge: Yes, on all routes crossing Victoria Harbour
• Wheelchair access: Low-floor buses mandated for all new franchised bus procurement

Hong Kong does not have a single bus company. It has a franchise boundary system that carves the territory into exclusive route packages awarded by government tender. The operator that wins a package gets the sole right to run routes within that geographic zone, and the zones have stayed remarkably stable across decades of franchise renewals. That is the durable architecture underneath every journey, and it is the first thing you need to fix in your head.

KMB and the Kowloon New Territories Grid

Kowloon Motor Bus (KMB) holds the largest package covering Kowloon and the New Territories. That is the dense urban grid of Nathan Road, the sprawling new town networks of Sha Tin, Tuen Mun, Tai Po, and the rural feeder routes into the northern borderlands. KMB runs the biggest fleet and the most complex route numbering system in the city.

Citybus, the Island and the Harbour

Citybus controls Hong Kong Island and the cross-harbour routes that connect it to Kowloon. If you are on the Island side of Victoria Harbour, the bus you board is almost certainly a Citybus vehicle unless you are on a KMB cross-harbour co-operation route. Citybus also operates the Cityflyer sub-brand, a fleet of luggage-equipped coaches running Airport Express services from the Airport to Hong Kong Island and Kowloon at a premium fare tier.

Long Win Bus is KMB's subsidiary but holds a completely separate franchise for Airport and North Lantau external routes. Long Win buses connect the Airport and Tung Chung to the New Territories. Their fleet has dedicated luggage racks and higher fare bands, and they participate in the KMB Long Win Interchange system that gives you a discount when you transfer between a Long Win airport bus and a KMB local route. New Lantao Bus (NLB) is the smallest franchised operator, running the South Lantau network and the closed-road village services where no other public transport exists. On South Lantau, NLB is a structural monopoly because the road access permit regime blocks other operators.

The Public Light Bus World

Outside the franchised system sit the public light buses, regulated under a completely different ordinance. Green minibuses run fixed routes with fixed fares and scheduled frequencies, and most accept Octopus. Red minibuses run unscheduled, with variable routes and driver-determined fares. A red minibus roof means you hail it, you ask the fare, and you pay cash. The 19-seat limit applies to both. Any change to that capacity requires a legislative amendment.

Boarding conventions differ by bus type, and getting this wrong is the most visible tourist mistake on Hong Kong roads. On all franchised double-decker buses you board at the front door and alight through the centre or rear doors. Tap your Octopus card on the reader next to the driver as you enter. The fare is deducted instantly based on the boarding stop and the route's fare band tier. On green minibuses you board through the front door and tap your Octopus card on the reader mounted near the driver. Some green minibus routes still require exact cash, so carry coins as backup. On red minibuses there is no Octopus reader. You board, take a seat, and when the driver calls for fares you pass cash forward. The fare is whatever the driver announces and it can change by time of day and demand.

How to Get Off

Alighting on franchised buses requires you to press the bell before your stop. On a double-decker, if you are upstairs and the bus is crowded, start moving down the stairs at least one stop early. On green minibuses you call out your stop to the driver. On red minibuses you call out your stop and the driver will pull over at the next safe kerbside point. Red minibuses have no fixed stops; they operate on a hail-and-ride basis along the route corridor.

The Payment Rules That Matter

Octopus card bus payment is the foundational fare medium across the network. The Octopus card is a stored-value contactless smartcard you load with cash at MTR stations, convenience stores, or via the Octopus app. Every franchised bus accepts it. Most green minibuses accept it. Red minibuses do not. Contactless bank card acceptance is rolling out on some Citybus and KMB routes but is not yet universal. Do not assume you can tap a Visa or Mastercard on any bus. Always carry an Octopus card with sufficient stored value, and carry coins for red minibuses and the odd green minibus that still runs cash-only.

The Octopus interchange discount is the network's hidden fare-reduction mechanism. At designated Bus-Bus Interchange points, tapping your Octopus card when transferring between specified routes within a time window triggers an automatic discount on the second leg. The discount window is strict and the same card must be used for both taps. If you tap outside the BBI zone or exceed the time limit, the full fare is deducted with no alert and no retroactive correction.

The route numbering system is a durable taxonomy that encodes route type, express status, and geographic corridor. Once you learn the prefix letters and the hundred-series blocks, you can read any bus stop sign in seconds. The system has remained stable for decades and applies across all franchised operators.

Route numbers without a prefix are standard all-stop services within a single franchise zone. A route numbered 1 through 99 on Hong Kong Island is a Citybus service. A route numbered 1 through 99 in Kowloon or the New Territories is a KMB service. The hundred-series blocks are the key to cross-harbour routes. Numbers in the 100s use the Cross-Harbour Tunnel. Numbers in the 600s use the Eastern Harbour Crossing. Numbers in the 900s use the Western Harbour Crossing. Each hundred-series block carries a cross-harbour premium fare tier, and the premium is highest on Western Harbour Crossing routes because of the tunnel's toll regime.

Prefix letters are the express and specialist markers. An 'X' prefix means an express route that skips intermediate stops and carries a higher fare band. A 'P' prefix means a peak-hour express service, running only during morning and evening commuter windows. An 'A' prefix means an Airport route operated by Cityflyer or Long Win, with coach seating, luggage racks, and the highest fare tier on the network. An 'E' prefix means an external route serving North Lantau and the Airport cargo area, with a lower fare than the 'A' routes but still above standard urban fares. An 'N' prefix means overnight service. A 'B' prefix means a border route serving the Shenzhen crossing points. An 'M' prefix means a feeder route connecting to an MTR station, often with a Bus-Bus Interchange discount structure built in.

Two routes on the same corridor can have different numbers and different operators. On Nathan Road, a KMB route with a 60-series or a number in that range serves a New Territories origin. A Citybus route with a 900-series number serves a cross-harbour destination. The number tells you the operator and the destination region before you read a single Chinese character on the destination sign.

The franchise boundary system is not a minor administrative detail. It dictates which bus you can board, what fare you pay, and whether your Octopus interchange discount applies. The boundaries are geographic and exclusive. A KMB route cannot pick up passengers on Hong Kong Island except at designated cross-harbour co-operation stops. A Citybus route cannot serve a pure New Territories origin-destination pair. NLB cannot run a route that leaves South Lantau except on the designated external corridor to Tung Chung.

This exclusivity creates a structural fare difference on parallel corridors. When you travel from Tsuen Wan to Tsim Sha Tsui, you are on a KMB route within the Kowloon and New Territories package, and you pay a standard intra-zone fare. When you travel from Central to Causeway Bay, you are on a Citybus route within the Hong Kong Island package, and the fare structure is set by a different operator under a different franchise agreement. The fares are not directly comparable across operators because the cost bases, tunnel toll obligations, and franchise fee structures differ.

The Cross-Harbour Premium

The cross-harbour premium is the most visible consequence of the franchise architecture. Any route that crosses Victoria Harbour incurs a tunnel toll that the operator passes through to the fare. The toll varies by tunnel: the Western Harbour Crossing has the highest toll, the Cross-Harbour Tunnel the lowest. The fare band tier for a cross-harbour route reflects the tunnel used, not just the distance travelled. Two cross-harbour routes of identical length can have different fares if they use different tunnels.

The Bus-Bus Interchange Safety Net

The Bus-Bus Interchange (BBI) network is the mechanism the Transport Department uses to mitigate the franchise boundary problem. At designated interchanges like Shing Mun Tunnels, Tai Lam Tunnel, and the three harbour crossings, you can transfer between routes and operators with an automatic Octopus discount. The BBI architecture allows the network to function as a connected system even though the franchises are legally separate. The KMB Long Win Interchange is the most integrated example, giving you discounted transfers between New Territories local services and Long Win airport buses at points like Tsuen Wan and Tsing Yi.

Operator	Franchise zone	Fleet type	Octopus	Luggage rack	Airport routes
KMB	Kowloon, New Territories	Double-decker, low-floor	Yes	No	No (via Long Win)
Citybus	Hong Kong Island, cross-harbour	Double-decker, low-floor	Yes	Cityflyer only	Cityflyer sub-brand
Long Win	Airport, North Lantau external	Coach, luggage racks	Yes	Yes	Yes
NLB	South Lantau, closed-road villages	Single-decker, some high-floor	Yes	No	No
Green minibus	Fixed routes territory-wide	19-seat minibus	Mostly yes	No	No
Red minibus	Flexible routes territory-wide	19-seat minibus	No	No	No

The Octopus card is the only fare medium that works on every franchised bus and on the majority of green minibuses. Load value at any MTR station customer service counter or add-value machine, at 7-Eleven and Circle K convenience stores, or via the Octopus app if your phone supports NFC top-ups. The card stores value up to a maximum of HKD 3,000, and the fare for each journey is deducted as a single tap on boarding.

On franchised buses the fare is distance-based within the route's fare band tier. You do not tap off when alighting. The system deducts the full route fare at boarding regardless of how far you travel. This is different from the MTR where you tap in and tap out, and it catches newcomers who assume they can pay a shorter fare by alighting early. You cannot. The full fare is charged at the front door.

Contactless Cards Are Still Rolling Out

Contactless bank card acceptance is the evolving part of the payment landscape. Citybus has rolled out Visa, Mastercard, and UnionPay contactless readers on a growing set of routes. KMB is following with a similar rollout. The HKeMobility platform and the operator apps show which routes currently accept contactless cards. Do not rely on a bank card as your sole payment method unless you have confirmed acceptance on your specific route. The Octopus card remains the safe default.

The Octopus Fare Subsidy Scheme

The Octopus Fare Subsidy Scheme is a government programme that rebates a percentage of your monthly public transport spending above a threshold, calculated automatically on Octopus transactions. The threshold and rebate percentage are adjusted periodically. The scheme applies to franchised bus and green minibus Octopus spending but not to red minibus cash fares. The rebate is collected by tapping your Octopus card at a designated Subsidy Collection Point, typically an MTR station kiosk or a 7-Eleven terminal.