This calculator is built for physician-loan-style planning. It gives you a fast monthly estimate, then helps you understand why the real payment can shift once contract income, reserves, PMI, and lender-specific structure enter the picture.
Use it to pressure-test your budget quickly. Then use the result to decide whether you need a scenario review tied to your actual contract, state, down payment, and timing.
It cannot tell you how a given lender will treat your student loans, reserves, contract timing, or property specifics. Those issues change the real payment conversation because they change which structures are actually available.
A conventional structure can look cheaper on rate and still lose when PMI, cash-to-close, or reserve pressure is added back in. That is why the calculator is useful — but not the final answer.
If this number is close to the line for your comfort, do not guess. Move from planning mode to a scenario review that reflects your actual state, contract, and structure.