With The Reaper's Due DLC, prolonged sieges/occupation also decrease prosperity.If provinces are sieged or raided, you and your vassals lose tax income, and recovery can take a long time.However, because you're employing the levies in the first place, this is not always cost-effective (unless you exclusively use levies from your vassals, which presents its own set of problems).īut money can also be lost through conflict: As a Catholic, fighting wars against heathens might earn you some funding from the Papacy as well.Sieges result in a small amount of gold, and captured nobles will ransom themselves.Simply fighting a war can increase your wealth as well: The defender's computed income may be largest if you avoid occupying their demesne. Winning a defensive war usually results in payments of reparations.Other types of tributaries provide less income but persist through succession. Winning an Extort Tribute war forces the defender to pay 40% of their income until your death.
Trade posts in coastal or important Silk Road counties can generate a large trade income at a very low construction price. Taxes paid by vassals can be seen in the liege's "Vassals" tab, and totals for each vassal government type are shown in the liege's demesne screen.
Also, a vassal pope or antipope will only pay you taxes if he has a positive opinion of you.