Mortgage Date Calculator
Calculate rate-lock and contingency deadlines, first-payment timing, prepaid-interest days, and the calendar days between mortgage milestones.
How Mortgage Date Timelines Work
- Rate locks are typically available in 15, 30, 45, or 60-day periods. Missing your lock expiration requires an extension — which costs money — or re-locking at current market rates, which may be higher.
- Purchase contract contingency deadlines (inspection, financing, appraisal) are counted in calendar days from the acceptance date. Missing them can put your earnest money at risk or void the contract.
- A typical purchase closing timeline runs 30–45 days from accepted offer. Refinances often take 30–60 days. Counting days precisely helps you coordinate appraisals, title work, and final walkthrough scheduling.
- Mortgage payments are generally paid in arrears. A common first-payment date is the first day of the second month after closing, while prepaid interest may cover the closing date through the end of that month. Your promissory note and Closing Disclosure control.
Calculation details
Methodology
Calendar targets add the entered number of calendar days to a starting date. The first-payment estimate uses the common convention of the first day of the second month after closing. Prepaid interest equals loan amount × annual note rate ÷ 365 × the number of days from closing through month-end, including the closing date.
Assumptions and limitations
- Milestones use calendar days rather than business days or jurisdiction-specific contract rules.
- Signed contracts and lender lock confirmations control all actual deadlines.
- Prepaid interest uses a 365-day simple-interest convention; lender calculations may differ.
- Escrow deposits, fees, credits, and other Closing Disclosure adjustments are excluded.
- The first-payment convention is common but the promissory note controls.
Worked example: July closing
- June 15 contract acceptance and rate-lock start
- July 15 closing and 30-day rate-lock assumption
- $400,000 loan at 6.5%
- 30-year term
The contract-to-close window is 30 days, estimated first payment is September 1, and July 15–31 produces 17 prepaid-interest days. At about $71.23 per day, estimated prepaid interest is about $1,211.
The dates and interest are planning estimates. Confirm deadlines, funding date, day-count convention, and first payment with the signed documents.
Official sources
- Consumer Financial Protection Bureau — Prepaid interest: Explains interest commonly collected between closing and the start of regular payments.
- Consumer Financial Protection Bureau — Closing Disclosure: Explains the final disclosure containing loan terms and closing charges.
Frequently Asked Questions
How long does the mortgage process take?
From accepted offer to closing, a purchase mortgage typically takes 30–45 days. The main phases: pre-approval (1–3 days), appraisal order and completion (1–2 weeks), underwriting (1–2 weeks), and final approval and closing (3–5 days). Refinances typically take 30–60 days. Complex situations (self-employed income, condo approvals, title issues) can add 2–4 weeks.
What is a rate lock and how long does it last?
A rate lock is a lender's commitment to honor a specific interest rate for a set period — typically 15, 30, 45, or 60 days. Longer locks cost more (either a higher rate or a fee). If you don't close before the lock expires, you either pay an extension fee or re-lock at current market rates. Lock the rate only when you have a purchase contract and a realistic closing timeline confirmed.
When do mortgage contingency deadlines apply?
Most purchase contracts include a financing contingency (typically 21 days) — the deadline by which you must have a loan commitment letter. Missing it without an extension can put your earnest money at risk. Inspection contingencies (5–10 days) and appraisal contingencies (14–21 days) are also common. All deadlines are counted in calendar days from the date the contract was accepted.
When is the first mortgage payment due after closing?
A common convention is that the first mortgage payment is due on the first day of the second month after closing. For example, a June 15 closing commonly produces an August 1 first payment. Your promissory note and first-payment letter provide the controlling date.
How are prepaid-interest days estimated at closing?
Prepaid interest commonly covers the closing date through the last day of that month. A simple estimate multiplies the loan amount by the annual note rate, divides by 365 for daily interest, and multiplies by the number of prepaid-interest days. Lender conventions and the final Closing Disclosure control the actual charge.
How to use this estimate
This calculator is an educational planning tool. Results are based on the figures and assumptions entered by the reader, use standard mortgage mathematics, and are not a loan offer, approval, or substitute for a lender's Loan Estimate. Taxes, insurance, fees, mortgage insurance, and available rates vary by borrower, property, lender, and location.
Review the assumptions, compare more than one scenario, and confirm the final numbers with a licensed mortgage professional before making a financial commitment.