Basics

Nobility: +D100+100 GC
Upper Middle-Class Citizens: +D100+50 GC
Middle-Class Citizens: +D100+25 GC
Lower Middle-Class Citizens: +D100 GC
Lower-Class Citizens: No modifier
Outlaws or Criminals: -D100 SS

Modifiers

Having a High-Paying Job or Business (>1000 GC / month): +100 GC
Patronage by a Local Noble or Important Figure: +25 GC
Being a Known Trouble-maker: +15 GC
Recent Acts of Heroism or Services to the City: -25% to all tax

Income Source Modifier

Farmers and Agricultural Workers: -10% personal Tax
Skilled Craftsmen or Artisans: +10% personal Tax
Merchants and Traders: +D100+50 GC
Adventurers or Mercenaries: +10% personal tax (due to unpredictable income)
Scholars or Sages: -10% personal tax
Alchemists or Potion Makers: +10% personal tax
Magic Users or Spellcasters: +15% personal tax (due to their valuable services)
Religious Figures or Clergy: -10% personal tax (in some societies, they may be exempt)
Entertainers or Performers: -10% personal tax(varies based on popularity)