By terms of the treaty, Morocco was to pay Spain a war indemnity of 20 million duro (equivalent to $4 million 1861 US dollars)—far greater the balance of the Makhzen's treasury.
[1]: 25 To help pay the indemnity, Morocco took a loan from private investors in Britain.
The loan, issued by Sirs Robinson, Fleming and Philippe P. Blyth, amounted to £501,200, of which the Sultan actually received £426,000.
[2] The British loan was to be repaid from half of the tariff revenue collected at Moroccan ports, to be overseen by European agents.
[1]: 25 [2] The other half of the tariff revenue at Moroccan ports went toward the amount owed directly to Spain.