I wouldn't translate it, as Titulär Capitaine, captain by name, or by title, Scharnhorst was paid only according to the regulations as a Lieutenant, though having the rank of a capitain, he gets only the payment of a Lt.

In case of a Capitain - he has not only the rank of a captain but also the payment.

As for having a company, I assume that it was similar to the Prussian Armies "Kompaniewirtschaft" where additional to your income by rank you could also increase it by running the economics of a company to your benefit.