30-Year Fixed
The predictable one. Principal and interest stay level for the entire term, so a payment you can afford in year one is the same payment in year eighteen.
Example: a $360,000 loan at 6.25% runs about $2,217/mo in principal and interest; at 6.50% it is about $2,276. That quarter point is roughly $59 a month — about $21,000 across 30 years. Illustrative only.