Enter your own numbers. Estimates, not tax advice.
NH property tax varies widely by town; 1.545% is a placeholder, so use the rate for the town you are buying in. COL %: negative = NH cheaper; applied to estimated non-housing living costs (take-home minus housing) so it doesn't double-count the mortgage/property tax you already entered. For real two-city numbers use Numbeo's side-by-side comparison.
Moving NJ → NH looks like a big monthly win, but the pieces are not equal. Only one of these lowers this mortgage payment.
The property-tax line is what a same-priced house would cost more in NJ — your NH property tax is already inside the PITI above, so it is not a second discount. The COL line is non-housing spending (groceries, etc.), a separate budget, not money off the mortgage. Income tax: NH has no wage or interest/dividends tax ($0 — I&D repealed 2025). NJ uses the 2025 gross-income-tax schedule for your filing status, less personal exemptions ($1,000 each, $2,000 if MFJ) and $1,500 per dependent. NJ Child Tax Credit fully phases out above $80k income. Verify with a CPA before signing.