The tufted titmouse prefer to nest in natural cavities, but will use a nesting box. Nesting In late winter and early spring, the flocks break up and pairs are formed. Once the pair chooses a site, the female will exclusively build the nest. The nest is constructed from moss and leaves and lined with fine materials such as hair. Construction of the nest takes between 6 to 11 days.
Copulation occurs during the nest building phase.
Egg laying occurs in early morning at one egg a day. During egg laying, the titmice cover the eggs with nesting materials. Incubation starts after the last day of egg laying and is done only by the female. During incubation, the male will remain near the nest and feed the female. The male will give song when he comes near the nest area to notify the female that he has arrived with food for her.