Income purification is the broader Islamic finance concept of cleansing one's earnings from any impermissible elements. While dividend purification specifically addresses investment income, income purification encompasses all sources of potentially non-compliant earnings that a Muslim may need to address.
Common scenarios requiring income purification include: dividends from stocks with non-permissible revenue, interest earned on bank accounts (even if unintentional), returns from investments that were later found to be non-compliant, and any other income that includes a non-permissible component. The purified amount is donated to charity without expectation of religious reward.
The practice of income purification reflects the Islamic principle that wealth should be earned through permissible means. Scholars emphasize that purification should be done conscientiously and promptly, not accumulated indefinitely. For Muslim investors, establishing a regular purification routine — whether monthly, quarterly, or annually — helps ensure compliance and peace of mind.