Debt service funds are used to account for the accumulation of resources to pay principal and interest on long-term debt. Resources come from tax revenues, transfers from other funds, and interest earnings. The debt service fund is used to record the receipt of these resources and the payment of principal and interest. Journal entries are made for items such as receiving transfers, earning interest revenue, recording expenditures for interest payments, and paying principal and interest. The modified accrual basis is used, so interest expenditure is only recorded when due rather than accrued over time.