  That the exact quantum S-matrix of $\text{T}\bar{\text{T}}$-deformed field
theories is known has interesting consequences for their perturbative
renormalisation. Recent investigations into the interplay between
renormalisation and integrable deformations have focused on those cases where
the (undeformed) seed theories are integrable. In this paper, we study the
perturbative renormalisation of non-integrable
$\text{T}\bar{\text{T}}$-deformed field theories, focusing on a theory of
scalars with a quartic interaction. We show that in this theory, the 4-point
1-loop S-matrix exhibits features similar to its integrable cousins. We also
carry out a similar analysis for the case of an integrable quantum field theory
comprising a pair of chiral bosons. Our discussion of this latter theory
supplies the first explicit example of a perturbative field theory computation
in the formalism due to Sen.
