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Advantages of paying more of your mortgage while you know you won't continue to live there your whole life
The main factors you have to consider are: Could you get a better return on that money by investing it somewhere?  The investment rate should basically be more than the mortgage rate. If you find yourself suddenly in need of money (eg, loss of job) do you have enough savings to ride that out?  If not, investing the extra money in an instant access investment, even at a lower rate, may make sense as it gives you future flexibility. Do you have any other debts that are at a higher rate?  If so, pay those off first as you will get more bang for your buck.