What does waiting a week cost a house you haven't bought yet?
On a $320,000 loan the monthly payment is $2,153 at today's average rate and $2,186 at DataSnack's number for seven days from now, $33 more a month.
At the national average rate for a 30-year fixed loan, principal and interest only.
- Now: $2,153
- In seven days: $2,186
The working
The monthly principal and interest on a 30-year fixed loan at today's average 30-year rate, and at DataSnack's number for that rate seven days from now.
| Step | Expression | Now | In seven days |
|---|---|---|---|
| Monthly principal and interest | `pmt(rate / 1200, 360, loan)` | $2,153 | $2,186 |
| Paid over 30 years | `payment 360` | $774,958 | $787,053 |
Each name in an expression is an input below or an earlier step.
What this runs on
DataSnack's models
- `rate`: 30-year mortgage rate, 7.11% now (2026-11-12), 7.27% in seven days
Your assumptions
- `loan`: Loan amount, $320,000 (change it on the page)
Every model here is graded in public. Download the workbook and rebuild it.
What this cannot tell you
It does not include taxes, insurance or fees, and it says nothing about the rate a given lender would offer.
The record
The first answer is graded seven days after it is made.
Data: CSV · JSON · Workbook (Excel)
Canonical: https://datasnack.ai/q/house-waiting-cost · Updated 13 Nov 2026 12:00 UTC · DataSnack forecasts are analysis, not investment advice.