X0102 24F-2NT LIVE 0001503932 XXXXXXXX 333-170271 false false S-6 Van Kampen Unit Trusts Taxable Income Series 312 225 Liberty Street New York NY X1 10281 true 811-2754 333-170271 02/28/2026 0.00 471639.00 13765409.00 14237048.00 0.00 (14237048.00) 0.000138100 0.00 0.00 0.00 CRAIG S. FALDUTO Executive Director, Investment Research 03/26/2026