Every month, Darker Times Fiction hosts a horror short story competition. There is an $8 entry fee per story. The prize amount will depend on the number of entries, but will be a minimum of $24. The winning story, as well as the runners-up (and possibly some honorable mentions) will be published in an anthology. The contest deadline is the last day of each month, so for this month it's Halloween, Oct. 31st.
The C4WE (Center for Writing Excellence) hosts regular genre fiction contests. This month, the genre is fantasy. Stories must fall between 1500 and 2000 words. There is a $10 entry fee, but only 50 entries will be accepted, so at worst you have a 1 in 50 chance of winning. Three prizes will be awarded: $50, $25, and $15, plus publication. The deadline for the fantasy contest is November 1st.