Budgies, kept in the proper environment and fed a proper balanced diet can usually have a life expectancy of about 8-10 years. The oldest budgie I have ever had lived to over 14 years of age.
The secret to having your birds live a long and healthy life is to react immediately if you notice something wrong.

Being able to get help early is the best way to help your budgie if it gets sick. The first thing to do is observe your bird closely so that you know what is normal for it, then you will recognise if something seems ‘off’. So lets start with the signs of a healthy happy budgie.
Signs Of A Healthy Budgie
– feathers – clean, smooth and nice bright, crisp markings.
– posture – upright, natural and alert.
– beak, cere, eyes and feet – all clear and without any discharge or extra roughness or growths.
– vent – clear, without any build up of droppings.
– breathing – smooth and regular, not faster than usual or laboured (panting), not noisy.
All these things indicate a healthy happy bird. The other factor is the behaviour of your budgie. It may alter its behaviour, become quieter or agitated, sleep more, for example, before any physical symptoms show. So it is also important that you know your birds normal routine and behaviour.

Remember, budgies are a prey animal and one of the features that go along with this is pretending you are well, even if you are not. So if they look sick they are probably worse than you think – get help earlier rather than later. If you suspect your budgie to be ill, I strongly recommend bringing it straight to your vet asap. I am not an expert on your budgies health, so please do not not contact me regarding any health issues. Go to your vet as soon as you suspect something is wrong.