Are supersymmetric models with large tanβ natural?

We point out that, contrary to general belief, generic supersymmetric models are not technically unnatural in the limit of very large values of the parameter tanβ when radiative corrections are properly included. Rather, an upper limit on tanβ only arises from the requirement that Yukawa couplings remain perturbative up to some high scale. We quantify the relation between this scale and the maximum value of tanβ. Whereas tanβ is limited to lie below 50–70 in the mSUGRA model, models with a much lower scale of new physics (beyond supersymmetry) may have tanβ≲150–200.