Believers must refrain from all forms of usury, and those who do not refrain should expect war from God and His messenger, though if they repent they may keep their capital.1, 2, 3
Islamic economy is a productive economy.1
People will return to God and be questioned about their usury, their hoarding, and their excess wealth.1, 2, 3, 4
The principle that God diminishes usury extends to any sinful earnings, such as gambling, so those who seem to profit from them really end up losing.1, 2, 3, 4
The Quran condemns only those who take usury, while those forced by circumstances to pay it, like someone who can only buy a house with a mortgage, are victims rather than sinners.1, 2, 3, 4
Usury is any fixed percentage earned on deposited or loaned money, while earnings that fluctuate with investment profits and losses are not usury.1, 2
Usury involves a victim who is taken advantage of; wherever there is a victim there is sin, so ordinary bank interest, where both sides are happy, is not usury.1, 2, 3
It is perfectly all right to take a loan and pay interest on it to invest in a project that will grow your money, since a rich believer is better than a weak and poor believer.1, 2, 3
Taking interest is forbidden, but a person forced by circumstances to pay interest is a victim and commits no sin.1, 2, 3
Usury is any interest that is fixed and guaranteed, even one percent, while returns that fluctuate as a result of investing are permitted.1, 2, 3