There's nothing worse than a slow internet connection. Possibly killer clowns, but even then, slow internet would be a very close second.
Slow internet gets even worse when you've been promised - and are possibly paying for - a fast internet connection. While the quality of NBN service is always being improved NBN slowdown still happens. Thankfully we know a thing or two about fixing slow NBN.
Before you go any further perform a speed test using the following tool.
Got your results? Take a look at the table below to compare your speed to the maximum you should be seeing on your
NBN speed tier. You can also see the typical evening speed for that sped tier. A typical evening speed is what you
can reasonably expect to achieve between 7pm and 11pm each day.
NBN speed tier | Maximum NBN speed | Typical evening speeds |
---|---|---|
NBN 12 | 12 Mbps | 10-12 Mbps |
NBN 25 | 25 Mbps | 19-25 Mbps |
NBN 50 | 50 Mbps | 42-50 Mbps |
NBN 100 | 100 Mbps | 90-100 Mbps |
NBN 250 | 250 Mbps | 200-250 Mbps |
NBN 1000 | 1000 Mbps | 250-800 Mbps |
Let's take a look at the issues that could be causing your NBN to slow down and the solutions you can try to fix it.
Reason your NBN is slow #1: Hardware issues
It's easy enough to blame the network for your slow NBN, but according to NBN Co, modems are more often than not the culprit. Back in 2019 the organisation completed an analysis of over 700 households in order to diagnose speed complaints. From its investigation, NBN Co concluded that the most common speed issues stemmed from:
- Modems with out-of-date firmware
- Channel interference
- Positioning and placement of the modem
Solution #1: Update or upgrade your current modem
Even if you don't want to buy a new modem, you can fix some of the issues above pretty quickly on your current one. Here are some options.
Check that your modem's firmware is up to date
Provider-supplied modems were the biggest group to face this issue, so if you're rocking a branded modem from Telstra, Optus, TPG, or any of the others then this might be the ticket. Updating firmware isn't the easiest process, and it will be different depending on which modem you have. You can check with your telco for instructions.
If your modem is looking a bit raggedy around the edges then it might be worth upgrading to
a newer model.
Try another channel
If your current modem is multi-banded you can check the settings to see how much bandwidth is available on each frequency. Switching over to a less congested frequency can help to amp up speeds. Alternatively, if you're looking for a new modem, keep an eye out for multi-band modems that automatically find the best band.
Try changing the position of your modem if possible
WiFi speed can be adversely affected by interference in the home; this can come from walls, doors, major electronic devices, and even sometimes empty space. Try moving your modem away from major electronic devices like TVs, and fridges, and place it in a space where you can see it from most places in your home. Fewer walls in the way mean less interference and faster speeds. It's also a good idea to elevate the modem this will help reduce interference from the furniture.
Extend the range of your modem
Modems cover a certain amount of square metres in a circular radius, if your modem is in a corner then you're missing out on a chunk of that radius as it is. You can fix these problems by enabling a mesh network in your home with multiple points of interconnect. These may be powerline adaptors, WiFi extenders, or just a flat-out mesh WiFi system such as the Amazon Eero.
Reason your NBN is slow #2: Network congestion

Just as road traffic can slow down during peak hours the NBN can too. Both are pretty much for the same reason. NBN connections tend to slow down in the evening when everyone's finished dinner and hopping online to stream, browse,
play video games and more.
Why is this? Well, internet service providers buy access to the NBN in bulk. They assess the number of connections in a certain area and then predict how much bandwidth they need. Bandwidth is capacity: think of it as the width of a road.
The wider a road the providers buy, the more cars can travel, but at a higher price to that provider. The narrower the road, the less bandwidth there is to share, and everyone's performance takes a hit. It's quite literally a traffic jam.
How slow NBN connections get at night varies from provider to provider. Providers are obligated to display these typical evening download speeds in marketing materials including the plans displayed on their website. Not all NBN connections slow down the same, some barely slow down at all. You can try running an internet speed test between 7pm and 11pm and compare your result to both the typical evening speed advertised by your provider, as well as the maximum for your speed tier.
Solution #2: Switch NBN provider
Because the ACCC requires NBN providers to be transparent about typical evening
speeds telcos have improved their evening speeds from the early days of the NBN - some
more than others.
The table below shows popular NBN plans from our database.
Switching internet
providers is a simple and easy process giving you the freedom to move to another plan if you're
unhappy with your current service.
If you find that network performance doesn't improve with a new provider it could point to a greater technological limitation in your area or at your address. However, if this is the case, a provider shouldn't be selling you a plan that advertises speeds faster than you can actually get in the first place.
Reason your NBN is slow #3: Distance from the node
If your home is connected to the National Broadband Network using Fibre to the Node (FTTN) technology, the distance from your house to the node can make a huge difference in the speed and performance of your service. That's because the NBN signal is carried from the node to your home using old copper wires, and the further the signal has to travel over copper, the more speed may degrade along the way.
NBN Co estimates that about 90% of homes on FTTN should be within 700m of the nearest node, but even at this distance, the signal can degrade quite a bit. This is referred to as "attenuation" and it's one of the key reasons why many people experienced slow ADSL2+ speeds on their old connection. Basically, a house sitting next to the node will get a great speed, while houses further away will experience slower speeds. The graph below illustrates what attenuation looks like.

If you've signed up for a plan that's faster than your physical connection to the NBN can handle, your provider is obligated to let you know and to give you the option of swapping to a slower - and cheaper plan.
Fibre to the Building (FTTB) NBN connections can also suffer a similar issue, but it should be less common. In the instance of a Fibre to the Building connection type, fibre is run directly to the building itself, and a copper run connects individual apartments. Since far less copper is used, there is less potential for speed degradation.
Similar issues can also apply to Fixed Wireless and Satellite NBN connections. There is no node in these connections, but there are a number of technological obstacles between your home and the greater internet, so you may find that there are hard limits on what sort of performance you can expect from your connection.
Solution #3a: Check if you're eligible for a free NBN upgrade
NBN is aware of the attenuation issues for FTTN type connections and is in the process of upgrading millions of connections over to Fibre to the Premises (FTTP) for free.
To check your eligibility enter your address on the NBN website. Upgrades are also available for those on Fibre to the Curb (FTTC). Those upgrading from FTTN can choose between NBN 100, NBN 250 and NBN 1000 plans and those upgrading from FTTC can choose from NBN 250 and NBN 1000. If you're eligible you can make the order through a participating provider. Upgrading can take several weeks from your enquiry to when the upgrade work is complete.
NBN Co has also started working on enhancements to improve the quality of Fixed Wireless connections and from mid-2024 plans to offer higher speed plans in upgraded areas.
Solution #3b: Try mobile broadband or home wireless broadband
If you can't get a decently speedy NBN connection at home and you can't get or wait for an upgrade, you might be best off cutting the cord and going wireless. As the name suggests, mobile broadband is a connection powered by the same networks used by smartphones. Home wireless internet is too but is slightly different in execution.
Most home wireless internet plans come with unlimited data and have more robust modems that require mains power. Mobile broadband plans have data limits and have battery-powered modems designed for on-the-go usage.
4G home wireless plans have typical download speeds ranging between 16Mbps and 25Mbps. 5G home wireless plans have typical speeds starting at around 49Mbps and can go as high as over 500Mbps. Telcos don't advertise typical speeds for mobile broadband plans but they do note download speed caps. These can range from 100Mbps on the lower end and 250Mbps on more expensive plans. Some are uncapped.
One limit to keep in mind is that a 5G home wireless or mobile broadband plan relies on you having 5G availability in your area. First here are 5G home wireless plans organised by download speed:
If you decide to choose a plan capped at 50Mbps, this means it's the equivalent of NBN 50, however, you may experience
slightly slower speeds during peak hours. This is a great option if you're either conscious of the price
or you know you won't use over 50Mbps.
Here's pricing for 5G home internet plans capped at 50Mbps:
If you choose a plan capped at 100Mbps, this means it's the equivalent of an NBN 100 plan, however, you may
experience slightly slower speeds during peak hours. This is a great option for households with multiple
members who regularly connect to the internet at the same time.
Here's pricing for 5G home internet plans capped at 100Mbps:
Telstra, Optus, Yomojo and SpinTel currently offer uncapped plans. These can go as fast as network conditions allow but exact speeds will depend on your coverage and congestion. Generally, though we have found 200Mbps is a pretty safe average.
You can compare 5G plans against these 4G home wireless internet plans:
If you'd prefer mobile broadband, here are a couple of plans with at least 100GB.
To use a mobile broadband plan you'll effectively need a compatible modem. These are typically known as Pocket WiFis or portable hotspots. You could also use an older smartphone or tablet as a wireless hotspot.
Reason your NBN is slow #4: You're paying for a slower speed tier
A more obvious reason for slow NBN speeds could simply be the plan you're on. There are four widely available NBN speed tiers, ranging from 12Mbps to 100Mbps as well as two faster speed tiers ranging from 250Mbps to 1000Mbps which are only available on certain connection types.
Because of the number of discounts that exist if you're on an NBN 12 or NBN 25 plan you may be able to get a faster speed and save money.
Solution #4: Sign up to a faster speed tier
If you suspect your NBN plan is the issue, there's an easy fix. You can simply sign up for a faster plan. If you don't know the speed of your NBN plan, you should be able to find it listed on your bill. You can learn more about NBN speed tiers here, but we'd suggest that most Australians should be signing up for an NBN 50 plan at a minimum. NBN 50 is a massive speed boost over ADSL, and the plans tend to be of good value.
Internet speed is a shared resource. For example, if you're streaming a movie on Netflix, the internet will be slower for everyone else using your connection at the same time. Faster NBN speeds mean there's more capacity to share: you can stream all the video you want and no one else will notice any slow-down.
NBN 50 plans are typically fast enough to support a family of two to three people. An NBN 100 plan is worth considering if you're an internet lover who needs large downloads ASAP or if you're part of a household with a lot of connected devices.
You can compare NBN plans by speed tier here:
If you're on an FTTP or HFC NBN connection, you can sign up for an even faster NBN 250 or NBN 1000 plan.
Reason your NBN is slow #5: General connection issues
Networks are complicated and there are plenty of opportunities for small issues to create big problems. Especially on a network the size of the NBN. These issues can occur in the wider network or inside your home. Sometimes even both.
In terms of the wider NBN, the Telecommunications Industry Ombudsman (TIO) has fielded plenty of complaints that relate to good old-fashioned incompetence, delays, and faulty equipment. This isn't unique to the NBN, but it's frustrating nonetheless - especially because the solution can often be outside of your hands. If there are issues you just can't solve, you may simply need to contact your internet provider and see what they can do.
No one should accept a faulty connection.
In terms of your home, there are plenty of factors that can affect the speed of your internet. These can include a dodgy modem, faulty wiring, or even how your furniture and appliances are arranged.
Solution #5: Good old-fashioned troubleshooting
If think your NBN problems might exist inside your house, here are a few things you can try before you burn your modem, move to a cave, and swear off the internet forever.
The first step is running a speed test with your computer directly connected to your modem. By this, we mean plugging a laptop into the modem using an Ethernet cable - not testing using WiFi. There are a number of reasons why your WiFi connection might suck, so testing over a cable is the best way to get clear on the situation.
If you don't have an Ethernet cable or your computer doesn't have an Ethernet port, run a speed test with your laptop sitting right next to your modem. The results won't be quite as conclusive, but they'll still help diagnose the situation. In either case, if your speed test is significantly faster over Ethernet (or when your device is right next to the modem), your WiFi could be the culprit. The wireless signal might just not be powerful enough to cover your entire house, or there could be other appliances - such as microwaves - creating inference.
The modem you were sent by your internet service provider could be to blame. We've heard several stories about how a replacement modem made all the difference in connecting the devices in a home with a decent, solid connection.
We know that buying a new modem and setting it up is a pain in the neck, but it might be the difference between mediocre internet and getting the service you pay for. Just make sure you unpack the modem carefully and keep your receipt. If you find that the modem is not the culprit, you'll want to return the new one.
Reason your NBN is slow #6: Cloud storage and VPNs
"The Cloud" is a great innovation that can also be a headache. Off-device storage systems like Google Drive, DropBox, OneDrive and the like are often used to store files remotely. This is even more likely in the case you're working from home. Many of these programs can use up a large chunk of your bandwidth especially if you're using them all day long. Sometimes these programs are set up to sync constantly in the background.
Another cause that could be more prevalent for those working from home is using a VPN connection. A VPN or virtual private network is often used to access a different network remotely. This can be another network in Australia or one overseas. A VPN can slow down your NBN because it takes longer for your data to be encrypted and decrypted at the server's end and your need.
Solution #6: Update your settings
For a cloud service, it's a good idea to check your settings and see how often your files need to be synced. You should in some cases even be able to limit the amount of bandwidth the program has available. This way your files will still stay synced but your program won't be trying to sync as many all at once so constantly. This could free up some of your bandwidth.
When it comes to a VPN it will depend on what you're using it for. Did you want to watch Netflix content in another country and forget to set it back to Australia? Or do you need to be connected to the VPN for certain secure work tasks? Turning off your VPN when you don't need to route your data through another network should see an increase in your NBN speeds.
Slow NBN FAQs
What is a good speed for NBN?
A good NBN speed will come down to two main things; what you're using your internet for, and how many people will be using it at any given time. It's recommended that you have an NBN speed of at least 25Mbps if you have a household of one or two people, and are using the NBN for things like streaming movies, watching YouTube videos, browsing social media and listening to music online.
If you have a larger household of three or four people, then it's recommended you opt for an NBN speed of at least 50Mbps. These are minimum recommendations. If you've got people working from home or running an online business you may want to consider a faster plan.
How can I speed up my NBN?
There are multiple ways to speed up your NBN. Try:
- Moving your modem to a less congested area
- Adding a WiFi booster to your setup
- Change to a faster NBN plan
- Upgrade your technology type
- Update your modem's firmware
Why is my fixed wireless NBN so slow?
Unfortunately, fixed wireless NBN can get incredibly congested during peak hours, so it may be slow because everyone wants to use the network at once. There may also be issues with your WiFi router, or with the fixed wireless tower that you are connected to.
Why is my WiFi so slow?
NBN can be slow for a variety of reasons, but if it is slowing down significantly over WiFi as opposed to a wired connection then it may have to do with your modem. WiFi (the invisible network that we connect our wireless devices to) comes from your modem and can be interrupted by a range of things within the home. Every wall or door between you and your modem can affect the speed of your connection. You may also be too far away from your modem to be able to get the maximum achievable speeds.
Make sure your WiFi modem has a large enough range to cover your house, and keep it in an open space where possible, and away from major electronic devices. If you need better coverage you may consider a WiFi extender to help cover black spots.
Don't forget that if more people are connected to your network at the same time it may run slower. Speed is a resource shared amongst the different devices in your home.
Will the NBN ever get faster?
Believe it or not, the NBN is already getting faster. Now, NBN speeds of up to 1000Mbps are available provided that you have the right technology type. FTTP and HFC connection types can now achieve speeds of up to 250Mbps and 1000Mbps.
While it's great news for some, FTTN users are still struggling but hope is on the way there too. Thanks to a huge upgrade program, millions of FTTN households will be upgraded to FTTP for free. FTTC residences will also be able to request a free upgrade to FTTP once their suburbs are announced.
NBN Co has also proposed changes to NBN speed tiers that would see NBN 100 increase to 500Mbps and NBN 250 to 750Mbps.
Got questions? We've got answers. Whether you want to know what the NBN is, how to connect, if you have to connect, how much it will cost, what the alternatives are, or something else entirely, check out our complete guide to the NBN.
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