Refinance Calculator

One line: name | after property value | base amount OR target LTV percent (selected model) | annual rate percent | term months | fees | credits | cash OR finance | monthly other costs. Every number is explicit; at most 20 lines.

K = fees − credits. Base = after value × target LTV / 100, or your base borrowing. Cash costs: principal = base; cash released = base − old balance − K. Financed costs: principal = base + K; cash released = base − old balance. Equity = user property value − debt; LTV = debt / user value × 100. Property values are inputs, not appreciation forecasts. Payment is principal and interest; separately entered monthly escrow/other costs affect cash only. Observation cash = cash released + old cumulative payments − new cumulative payments + month × (old other costs − new other costs). Equity change = after value − new remaining debt − (before value − old remaining debt). Neither measure is profit or investment return. No same-principal net-benefit or break-even claim is applied to cash release.

Positive property values and old balance/payment; nonnegative rates, base/target LTV, fees, credits and other costs. Actual principal may be zero, never negative. Whole term 1–1,200 months; observation 0–1,200. Same currency; no taxes, approval, quote or rate advice. Up to 20 named scenarios; no numeric defaults.

Example only: before 300000; after 360000; old debt 180000; target LTV 60%; fees 4000; credits 1000. Base 216000, net cost 3000. Cash costs: principal 216000, cash release 33000; financed: principal 219000, release 36000. Enter rates, payments and months yourself.

Fixed nominal annual percentage / 1200; PMT = principal × r / (1 − (1 + r)^−n), or principal / n at zero rate. Fees enter upfront cash or new principal once. Simple payback = upfront fees / initial monthly saving only when saving > 0; financed fees are not applicable. Cash crossing is the first month with current cumulative payments − new cumulative payments − upfront fees ≥ 0. Balance-adjusted crossing adds current remaining principal − new remaining principal. Search includes month 0 through the observation period. Either crossing may reverse later; month 0 does not establish future savings. Complete monthly payment, interest, principal, balance and cumulative-payment schedules include both payoffs and the observation period. No taxes, insurance, penalties, discounting or inflation; no period rounding.

Enter your own principal > 0, current payment > 0, rates ≥ 0, fees ≥ 0, currency / unit, and safe whole new-term and observation months 1–1,200. Finite representable values are required. No suggested numeric defaults.

Same principal and remaining months at both fixed nominal annual rates ÷ 12. PMT = B × r / (1 − (1 + r)^−n); at zero rate B / n. Differences are new − current; annual = monthly × 12. Both rates are assumed for the entire remaining term. Fees and lender terms are excluded.

Monthly: nominal annual rate ÷ 12, payment P. Every two weeks: nominal annual rate ÷ 26, payment P / 2, 26 periods per year. Interest is charged once on the opening balance; final payment is min(balance + interest, scheduled payment). Equivalent months = periods × 12 / frequency (26 for every two weeks), without rounding up; raw values are in the report. No period rounding. Caps: 1,200 monthly or 2,600 two-week periods. An unpaid balance is incomplete, never a payoff. Twenty-six half-payments equal 13 monthly payments a year; twice monthly is only 24. Interest and time differences apply only when both schedules finish. Lender posting, fees, penalties and eligibility are not inferred; this is a model, not a recommendation.

The monthly payment is calculated WITHOUT offset: PMT = B × r / (1 − (1 + r)^−n), or B / n at zero rate; r = nominal annual percent / 1200. This payment stays unchanged in all three schedules. Each month interest = max(0, remaining principal − constant offset) × r; the final payment is min(principal + interest, scheduled payment). The offset reduces only the interest-bearing balance and does not repay principal or count as a payment. Compare zero offset, your primary offset and your separate alternative offset at the same fixed rate. Monthly periods, end-of-period payments, no period rounding, no fees, taxes, savings income, bank posting rules or lender terms. The cap is 1,200 months; any unpaid balance means incomplete and is not a payoff. Signed interest and time differences are zero-offset baseline − scenario, and are shown only when both schedules pay off. All amounts use your entered currency/unit without conversion. This is an illustration, not a bank, tax or lending recommendation.

Illustration only: principal 200000, annual rate 4.5%, 300 remaining months, primary offset 20000, alternative offset 25000, currency GBP. Payment is calculated from the full principal before offset. These are examples, not suggested inputs.