Right now internet.bs has the cheapest first year at $30.51, and Porkbun the cheapest renewal at $44.99. Over three years the lowest total at one registrar is $132.34 at Porkbun.
Why does .ph cost more after the first year?
Many registrars sell the first year below cost and recover it at renewal: at internet.bs, .ph renews at $185.00 after a $30.51 first year. Compare the renewal and 3-year columns before you buy.