SB 7.14.8 purport:

By God’s favor we sometimes get large quantities of food grains or suddenly receive some contribution or unexpected profit in business. In this way we may get more money than needed. So, how should that be spent? There is no need to accumulate money in the bank merely to increase one’s bank balance. Such a mentality is described in Bhagavad-gita (16.13) as asuric, demoniac.
idam adya maya labdham
imam prapsye manoratham
idam astidam api me
bhavisyati punar dhanam
“The demoniac person thinks, ‘So much wealth do I have today, and I will gain more according to my schemes. So much is mine now, and it will increase in the future, more and more.’ “ The asura is concerned with how much wealth he has in the bank today and how it will increase tomorrow, but unrestricted accumulation of wealth is not permitted either by the sastra or, in the modern age, by the government. Actually, if one has more than one requires for his necessities, the extra money should be spent for Krsna. According to the Vedic civilization, it should all be given to the Krsna consciousness movement, as ordered by the Lord Himself in Bhagavad-gita (9.27):
yat karosi yad asnasi
yaj juhosi dadasi yat
yat tapasyasi kaunteya
tat kurusva mad-arpanam
“O son of Kunti, all that you do, all that you eat, all that you offer and give away, as well as all austerities that you may perform, should be done as an offering unto Me.”

Grhasthas should spend extra money only for the Krsna consciousness movement.