  Transverse momentum dependent parton distribution functions (TMDPDFs) provide
a unique probe of the three-dimensional spin structure of hadrons. We construct
spin-dependent quasi-TMDPDFs that are amenable to lattice QCD calculations and
that can be used to determine spin-dependent TMDPDFs. We calculate the
short-distance coefficients connecting spin-dependent TMDPDFs and quasi-TMDPDFs
at one-loop order. We find that the helicity and transversity distributions
have the same coefficient as the unpolarized TMDPDF. We also argue that the
same is true for pretzelosity and that this spin universality of the matching
will hold to all orders in $\alpha_s$. Thus, it is possible to calculate ratios
of these distributions as a function of longitudinal momentum and transverse
position utilizing simpler Wilson line paths than have previously been
considered.
