Soldato
That's assuming you leave the rest in a 0% account.
I pay 3 of my regular savers from my monthly salary, the forth from my savings. Essentially I "upgrade" £150pm from 5.2% to 6.17%
It's basically never mathematically sound to move money from a higher interest account to a lower one on the basis that it earns more, as it won't without some kind of extenuating circumstance.