Fighters in the UFC are compensated via several means, including a contracted amount to show and win, sometimes locker room bonuses of varying amounts, performance bonuses, Reebok money, and for the most elite fighters, a cut of the PPV.

Four $50,000 performance bonuses are given out at each UFC, traditionally one bonus each to the fighters in the Fight of the Night, and then one each to winners in two outstanding fights.

At UFC 203 there were three performance bonuses given for main card events, and as often happens, the final one was for a UFC Fight Pass fight.

$50,000 Fight of the Night
Stipe Miocic defeated Alistair Overeem by Knockout (Punches, 1st Round, 4:27)

$50,000 Performance of the Night
Jessica Andrade defeated Joanne Calderwood by Submission (Guillotine Choke, Round 1, 4:38)

$50,000 Performance of the Night
Yancy Medeiros defeated Sean Spencer by Submission (RNC, Round 2, 3:09)

Reebok Pay
Under the UFC Athlete Outfitting policy, fighters are compensated for wearing Reebok apparel in the Octagon, and during fight week. The income is based on ZUFFA-era tenure in the UFC, or top tier promotions ZUFFA has acquired like Strikeforce and WEC.
1-5 bouts gets $2,500
6-10 bouts gets $5,000
11-15 bouts gets $10,000
16-20 bouts gets $15,000
21 bouts + gets $20,000
Champions earn $40,000 while title challengers get $30,000

UFC 203 Reebok Pay:

Stipe Miocic: $40,000
beat Alistair Overeem: $30,000

Fabricio Werdum: $10,000
beat Travis Browne: $10,000

Mickey Gall: $2,500
beat Phil CM Punk Brooks: $2,500

Jimmie Rivera: $2,500
beat Urijah Faber: $20,000

Jessica Andrade: $5,000
beat Joanne Calderwood: $2,500

Bethe Correia: $5,000
beat Jessica Eye: $5,000

Brad Tavares: $10,000
beat Caio Magalhaes: $5,000

Nik Lentz: $15,000
beat Michael McBride: $2,500

Drew Dober: $5,000
beat Jason Gonzalez: $2,500

Yancy Medeiros: $5,000
beat Sean Spencer: $5,000

Ian McCall: $5,000*
beat Ray Borg: $5,000*

C.B. Dollaway: $15,000*
beat Francimar Barroso: $5,000*

Total: $215,000

*Fighters didn’t fight, but due to late cancellation, they were paid anyway.