Deadline for SIMPLE deferrals for self employed or partners

[Guest rffahey]

What is the deadline for a self employed individual ( or partner on partnership ) to deposit his "elective deferrals ". Is it Jan 31st or by the tax return deadline ( April 15 or Aug 15 with extension ) ? The fund companies have numerous answers to this question !!

Thank you !

[KJohnson]

http://benefitslink.com/boards/index.php?showtopic=20837