The first borrower receives an amount of money lender, they pay back, usually but not always in regular payments to the lender. This service is usually provided at a cost, namely interest on the debt. A borrower May be subject to certain restrictions known as loan agreements under the loan.

Acting as a provider of loans is one of the main tasks for financial institutions. For other institutions, the issuance of debt contracts such as bonds is a typical source of funding. The bank loans and credit are a means of increasing the money supply.

Legally, a loan is a contractual promise of a debtor to repay a sum of money in exchange for the promise of a creditor to give another sum of money.

Interest is the price paid for the use of the surplus of savings over time. In the middle ages, the time was considered to be property of God. Therefore, to charge interest has been regarded as trade with the property of God . In addition, Rue. Thomas Aquinas, the leading theologian of the Catholic Church, argued that the filling of interest is wrong because it amounts to filling double , charging the thing and the use of the thing. The church has regarded this as a sin to wear, but this rule has never been strictly obeyed and has gradually eroded until it had disappeared during the industrial revolution. Some followers believe that banking began among the Jewish families because of restrictions on the church.

Financial oppression of Jews stretched to occur in areas where they were most hated, and if Jews respond by concentrating on money lending to gentiles, the unpopularity - and, of course, the pressure - would increase. This is because Jews have become an evil element in a circle. Christians, based on the biblical acts, have condemned the interest taken absolutely, and 1179 those who practised have been excommunicated. But Christians have also imposed financial burdens harder to Jews. The Jews have reacted by engaging in a business where Christian laws really distinguished in their favour, and thus became identified with the hated trade of moneylending.