Not all term deposits let you make additional deposits during the term, or withdraw money without penalty.
Most term deposits effectively lock up your money for the length of the term, so you can’t easily access your money until your deposit “reaches maturity” at the end of the term. After this, you can usually choose to roll your deposit over for another term and keep earning interest at the same rate, or switch to another term deposit that better suits your current situation.
If you do need to withdraw money from a term deposit early, you may need to give advance notice (e.g. 31 days) except in cases of hardship. You may also need to pay a fee, and the interest rate on your remaining deposit may be adjusted down. And in some cases, you may not be able to withdraw any funds during the term unless you close your account.
Because accessing your money early may affect the value offered by your term deposit, if you expect you may need to dip into your term deposit at some stage, the best option for you may be to look for a term deposit that offers penalty-free withdrawals.
It’s not common practice to add extra money to a term deposit once you’ve opened an account. Usually, you open a term deposit with your initial cash contribution and that’s that.
Some banks now give you the option to make additional deposits within a specific timeframe, such as within a week of opening your term deposit, while others let you make deposits at any time.
If you do find a term deposit that allows extra deposits, you might want to find out whether there’s a limit on the number of deposits you can make.