Match your household size, usage and connected devices to the right NBN speed tier — grounded in ACCC and NBN Co figures.
The right NBN speed tier is decided by how many people in your home use bandwidth-heavy activities at the same time — not by the number of devices connected. A phone on standby draws almost nothing; a 4K stream, a video call and an online game running together are what strain a connection during the busy evening period. The ACCC's Measuring Broadband Australia reporting (verify current 2026 edition) tracks typical evening (7pm–11pm) speeds by tier, which is the real-world number a household experiences, not the headline advertised speed. Use concurrent heavy use as your yardstick.
Browsing, email, HD streaming on one screen at a time. NBN 25 to NBN 50 covers this comfortably.
Two simultaneous HD streams plus browsing and occasional video calls. NBN 50 is the common fit.
Multiple 4K streams, work-from-home video calls and gaming at once. NBN 100 handles concurrent load.
Frequent 4K, large downloads, several remote workers and heavy gamers together. NBN 250 or 1000 buys headroom.
Concurrent activity, not total device count, determines the tier you need. Ten idle smart-home devices draw far less than two people streaming 4K at the same time. Estimate your peak-evening load by counting the bandwidth-heavy things happening together, then match that to a tier with room to spare.
Standard-definition needs little; a single 4K stream can draw around 25 Mbps. Two or three 4K screens at once is where a lower tier starts to struggle in the evening peak.
A single video call is modest, but several remote workers on calls simultaneously — especially with screen sharing and cloud sync — adds up quickly across an evening.
Live gameplay needs low latency more than raw speed, but large game and console updates download tens of gigabytes and compete with everyone else on the line.
The tier you buy is a maximum, not a guarantee. The number that matters for a busy household is the typical evening speed — the ACCC's Measuring Broadband Australia programme measures download speeds during the 7pm–11pm peak and reports how close plans come to their advertised rate (verify the current 2026 quarterly figures at time of reading). Your real-world speed is also capped by your connection technology: an FTTN line may not reach the same ceiling as FTTP on the same tier. Choose a tier with headroom above your concurrent peak so a busy evening does not drop you below what you actually need. If you suspect your current plan is falling short of its advertised speed, that is a diagnostic question rather than a tier-selection one.
Work through your household's real peak-evening load, then pick a tier with headroom above it.
How many people stream, game or video-call at the same time on a typical weeknight evening — not total devices.
One 4K stream plus one work call plus one game is a very different load to one person browsing alone.
Pick a tier whose typical evening speed sits comfortably above your concurrent peak, so the busy hours do not slow you.
Confirm your connection type (FTTP, FTTN, FTTC, HFC, Fixed Wireless) can realistically reach the tier before you pay for it.