An unruly beard? An open front door? It’s getting more expensive and potentially dangerous to slip up in territory held by Islamic State, as the violent extremist group struggles to feed its coffers.

Overall, ISIS is continuing to increase taxes and fines throughout its territory and in some cases, introducing new ways to raise revenue, all signs of a weakening financial situation, argues IHS Jane’s, a defense and security data analysis firm.

Since September, new forms of taxes are up across the caliphate, the research firm said. New fines introduced since December hit those who don’t trim their beard or who leave the house door open. There also are fines for repairing or installing satellite dishes. Meanwhile, trucks crossing checkpoints must now pay between $600 and $700; last summer, the fee was $300.

“Taxation makes up about 50% of the Islamic State’s monthly revenue sources and encompasses almost every aspect of the population’s life,” said Ludovico Carlino, senior analyst at IHS. “Taxes are imposed by a central government body and flexibility is allowed for regional governors. But, revenue from taxation has decreased by 23% due to the group’s failure to hold on to territory.”

In fact, between December and March, Islamic State lost about 22% of its territory, according to IHS Jane’s.

“The population controlled by Islamic State declined from around nine million to around six million people,” said Columb Strack, senior analyst at IHS. There are fewer people and business activities to tax; the same applies to properties and land to confiscate.”

The full, and growing, list of taxes and fines imposed by the Islamic State, as tracked by IHS Jane’s.

Islamic State also requires non-Sunni Muslims, former members of the security forces or former civil servants working for the Iraqi or Syrian government living in its territory to buy from it a “repentance” certificate, IHS Jane’s said.

Repentance used to be paid on an annual basis; now it is charged monthly. This is on top of the required payment of the jizyah, a tax historically levied on non-Muslims permanently residing in Muslim lands under Islamic law.

“The most heavily enforced category is Social Behavior,” Carlino said. “The Islamic State is very specific on dress codes, identification cards and neither smoking nor drinking. In February and March, we saw the Shariah police getting harsher and stricter with the population, an indicator of their financial troubles adding up.”