Pakistan did not pay anything to the AJK government as water usage charges/royalty for Mangla Dam for 36 years.
In 2003, they started paying 15 paisa per unit when they were paying 1 rupee 15 paisa per unit to other provinces of Pakistan.
The government of Azad Kashmir received 1/7th of what what other provinces were receiving for hydropower.
But the most egregious part is that while AJK government receives pittance for exporting hydro electricity to Pakistan, Pakistan re-exports the same electricity back to AJK at exorbitant costs!