Intermetallics of Cfmm2Fe14-xCoxB systems, where Cfmm stands for Ce-free mischmetal, were synthesized. The structural and magnetic properties were studied by means of bulk magnetometry for the entire composition range x = 0–14. All materials have a tetragonal crystal structure with decreasing lattice parameters upon Co substitution. The Curie temperature, Tc, rises with x. At room temperature, saturation magnetization, Ms, shows a maximum at x ≈ 2.0, while the anisotropy field, HA, and the theoretical energy product, (BH)max, exhibit weak maxima at around x = 4 and then gradually decrease for higher Co concentrations. X-ray diffraction patterns for the sample studied with (a) zero and (b) 20 kOe applied field show that magnetization lies along the c-axis at room temperature.