Huquq'llah is frequently compared to zakat, the Islamic almsgiving obligation, since both are religiously mandated wealth transfers calculated as a percentage and administered by religious authority, and Baha'i writers acknowledge Baha'u'llah wrote within a religious and legal culture where zakat was the familiar reference point. The two laws diverge in structure, however: zakat is typically assessed at two and a half percent of qualifying wealth held for a full lunar year and is directed by Islamic law toward specified categories of recipients, largely the poor and needy, administered at the discretion of local or state authorities across the Muslim world. Huquq'llah is assessed at nineteen percent of surplus above a threshold, is not tied to a fixed annual cycle but becomes due whenever the threshold is newly exceeded, and is centralized entirely under one authority, the Universal House of Justice, which may apply it to charitable relief, but equally to the construction of Houses of Worship, the Baha'i World Centre's development, or any other purpose it judges the faith's interests require.
Huquq'llah is also distinct from the general spirit of charitable giving Baha'i teaching otherwise encourages, since ordinary charity remains a separate, unregulated virtue a believer may practice at any time and toward any cause, while Huquq'llah is a specific calculated debt owed once its threshold is met. Baha'i writings describe the two as complementary rather than substitutable: paying Huquq'llah does not exempt a believer from the wider obligation of generosity the faith's ethical teaching otherwise expects.