pennywise

/ˈpɛniˌwaɪz/
adjective
  1. Careful about spending small amounts of money; thrifty in small matters.
    • He's so pennywise that he walks an extra mile to avoid paying for parking.
    • Being pennywise with your daily coffee can save you a surprising amount over a year.
    • My grandmother is pennywise and always clips coupons before going to the grocery store.