KMB & Citybus Franchised Buses

Hong Kong's two main franchised bus operators, Kowloon Motor Bus (KMB, which also runs sister company Long Win Bus on Lantau/airport routes) and Citybus, together run the backbone road network the MTR doesn't reach, and their fares work nothing like a flat metro tap. Franchised bus fares are set per route and, on longer routes, per boarding stop: the fare drops in stages as you board closer to the destination, so a passenger getting on near the start of a route pays the full fare while someone boarding a few stops from the end pays a fraction of it. Citybus's own published route-fare tables show this directly — on route A11, for example, the fare falls from a HK$40 full-journey rate at the origin down through HK$33, HK$17 and finally HK$4 at stops nearest Terminal One. For long, cross-district hauls this section-based system means a bus can end up costing about the same as the MTR, or occasionally slightly more, once you're travelling the full length of a route — but for a shorter hop that only covers part of a route's distance, the stage fare is often noticeably cheaper than the MTR's zone-based pricing, especially where a direct bus avoids an MTR interchange altogether. There's also a modest, separate saving available for regular commuters through the government's Public Transport Fare Subsidy Scheme, which rebates a share of monthly spending above a threshold across MTR, buses, minibuses and ferries — that scheme is significant enough to deserve its own entry elsewhere on this list, so it's only flagged here as one more reason bus travel is cheaper in practice than its sticker fare suggests. The scheme worth understanding in detail for bus riders specifically is the Octopus and E-payment Bus-Bus Interchange (BBI) Discount, run jointly by KMB and Long Win Bus (Citybus runs its own separate BBI scheme). It only works on specific, pre-registered route pairs at specific designated interchange stops — tap the same Octopus card or e-payment method on the second bus within a fixed time limit of boarding the first, and the fare on that second leg is discounted, sometimes by several dollars. KMB's own published example: a passenger travelling from Yau Tong to Kwai Shing (East) can ride Route 33 to Wong Tai Sin, tap onto Route 38 at the designated interchange stop there, and save HK$4.20 on the second leg. Crucially, this is not a universal transfer discount — it applies only to that specific registered pairing of routes at that specific stop, using the same payment card for both, with no more than nine unrelated Octopus transactions in between, and it evaporates if you interchange onto the same route number or use a different card. The everyday pitfall that erases these fare savings is traffic: buses share the road with everyone else, so a cross-harbour or peak-hour trip that the MTR completes in 20 minutes underground can easily take twice as long by bus through Central or Mong Kok congestion, and route coverage still has real gaps in newer developments and cross-harbour corridors where the MTR simply runs more direct lines. The honest takeaway is that buses are frequently the cheapest way to travel point-to-point in Hong Kong, particularly for routes the MTR doesn't serve directly, but the savings come paired with a real time cost during rush hour that a budget-conscious rider should plan around, not ignore.