Loan agreements Generally, where money is lent without a time for repayment being specified, the sum becomes repayable immediately. However, parties are free to fix a time for repayment, which would include the sum being repayable by instalments, or to agree that the loan is only repayable on demand. Where loans are repayable by instalments, the loan agreement will often provide the ability for the lender to ‘call in’ the entire sum and interest if there is default on any instalment. These are known as acceleration clauses. The terms of the agreement Here, notwithstanding the informality of the stated lending arrangement, there is clearly a contract for the loan of money whereby the lender, C, has agreed to lend a sum of money to D in consideration