undersave
underspend
cut one's cloth to suit one's purse
underindulge
spot
underbuy
undercover
underseek
penny-pinch
nickel-and-dime
misbudget
outsave
tighten one's belt
watch the pennies
economize
save
hain
scrimple
economise
undersaturate
undermargin
underpush
dip into
underlive
underearn
lay by
underresource
lessen
sock away
scrape by
underprovision
steal
spend money like water
retrench
overborrow
cut one's coat according to one's cloth
underburn
underinflate
underallocate
play with house money
undertax
undereat
underpay
moderate
unspoil
run on fumes
splash out
drop dimes
tide over
underhydrate