If annual lump sum payments do not work for your budget you can choose semi-annual (twice a year) or even monthly payments. (termlife360.com)
Some lenders will allow you to make pre-payments on a monthly basis or through annual lump sums. (moneysense.ca)
Most first and second mortgages the terms are standard but there are points that could be negotiated such as: 3 month termination penalty, NSF charges, annual lump sum payments, pre-payment options. (mortgagebrokerstore.com)