Cost of Waiting (Rate-Rise Scenario)
Side-by-side P&I and lifetime interest at today's rate vs a user-supplied future rate. Same loan, same term; no forecasting. A what-if, not a recommendation.
Formula and source
P&I at current rate vs P&I at future rate, same principal and term. monthly_delta = pi_future - pi_now; total_interest_delta = (pi_future - pi_now) * n.
Standard mortgage amortization at two rates. No forecasting model; both rates are user-supplied.
Audience
This tile is built for trades and the adjacent professions in the Real Estate group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tools
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.