Decision tools
Downsizing Calculator
Does downsizing make financial sense? Cash released, monthly cost change, your mortgage before and after, and why — not an assumption that smaller always means cheaper.
Direct answer:enter your current home and mortgage, what selling would net you, the smaller home you’re considering, and how you’d use your equity. This tool shows how much cash would be released or required, what happens to your mortgage, and the actual monthly-cost change — which is not guaranteed to be savings. It never assumes downsizing is automatically the better financial move.
Considering a larger, more expensive home instead? Use the Move-Up Calculator →
Current rate context
30-year national average
6.66%
As of August 27, 2026
This is the replacement home's likely financing environment — a smaller loan can still be partly or fully offset by a higher rate. Your current mortgage's rate is a separate input below, never replaced by this figure.
Explore rate history & payment impact →Monthly housing cost
A smaller home doesn’t automatically mean a lower payment — a higher rate, HOA, or taxes can offset some or all of the savings. This is what the numbers you entered actually produce.
Staying
$2,081
per month, total housing cost
- P&I
- $1,741
- Property tax
- $250
- Insurance
- $90
- HOA
- $0
- Mortgage insurance
- $0
- Other
- $0
Downsizing
$3,432
per month, estimated new total housing cost
- P&I
- $2,892
- Property tax
- $400
- Insurance
- $140
- HOA
- $0
- Mortgage insurance
- $0
- Other
- $0
Monthly housing-cost difference
+$1,351
Your estimated monthly housing cost would increase by $1,351 under these assumptions.
Cash released or required
What selling would estimate to net you, how much would fund the replacement home, and how much you’d retain. Retained cash is not automatically retirement income, investable assets, or spending money — it’s the dollar amount left over from the transaction under these assumptions, nothing more.
Equity after selling
$600,250
Equity used
$150,000
Cash retained
$300,000
Additional cash needed
$9,000
Transaction & equity economics
Selling costs and buyer closing costs are one-time costs, not part of the monthly numbers above.
- One-time transaction costs
- $58,400
- New loan amount
- $450,000
Monthly housing cost is higher under these assumptions, so transaction costs are not recovered through monthly housing-cost savings.
Your mortgage change
Your mortgage, before and after
- Current mortgage balance
- $250,000
- New mortgage amount
- $450,000
- Current monthly P&I
- $1,741
- New monthly P&I
- $2,892
Balance difference: +$200,000
Why your monthly cost changes
Why it changes
- Rate effect
- +$66/mo
- Term effect
- -$200/mo
- Loan-size effect
- +$1,285/mo
- Taxes, insurance, HOA & other
- +$200/mo
About $66 of the P&I change comes from the interest rate.
About $200 comes from changing the loan term.
About $1,285 comes from borrowing more.
About $200 comes from property taxes, insurance, HOA, mortgage insurance, and other recurring housing costs.
Total change: +$1,351/mo — the four effects above always add up to this total.
Your future financing position
Over the years ahead
- Cumulative housing-payment difference over 5 years
- +$81,049
- One-time transaction costs (separate, not summed with the above)
- $58,400
Current mortgage principal reduction
Starting balance: $250,000
Ending balance: $180,787
$69,213 reduced
New mortgage principal reduction
Starting balance: $450,000
Ending balance: $422,016
$27,984 reduced
Difference in principal reduction: -$41,229
This does not state that you would be better or worse off — that would require assumptions this tool deliberately excludes: home-price appreciation, opportunity cost on retained cash, taxes, and the value of anything you gain or give up that isn’t a dollar figure. It shows what changes financially under the assumptions you entered.
What this means
Assumptions used
- Your current mortgage payment is either entered directly or estimated from your loan's original amount, rate, and term — never re-derived from today's remaining balance
- Property tax, insurance, HOA, and mortgage insurance are whatever you enter for each home — nothing is estimated or defaulted for you
- Selling costs, buyer closing costs, and moving expenses are one-time costs, never amortized into the monthly comparison
What could change this
- An actual sale price different from the estimate entered, which changes net proceeds and how much cash is available
- A different final interest rate on the new mortgage than the editable assumption entered here
- Real closing costs differing from the itemized or lump-sum estimate entered
Smaller isn't always cheaper
A lower price doesn't guarantee a lower payment.
Homeowners with a substantial, low-rate mortgage sometimes find that a smaller replacement home’s higher rate, HOA, or taxes offset much of the expected savings. This tool exposes that tradeoff directly instead of assuming downsizing automatically reduces cost.
Methodology
How this is calculated.
This tool reuses the same shared Stay vs. Move engine as the general calculator and the Move-Up Calculator — the same current-payment resolution, seller-proceeds math, equity allocation, and four-effect decomposition, arranged around the downsizing question specifically. Selling your current home is estimated with the same itemized net-sheet math as the Seller Net Proceeds Calculator; you then decide how much of the proceeds funds the new down payment, how much you retain, and how much (if any) goes elsewhere.
The monthly-cost change is split four ways — rate, term, loan size, and non-P&I costs (taxes, insurance, HOA, mortgage insurance) — that always add up to the total. A mortgage-free current home or a cash purchase of the replacement home both work correctly: the math simply treats the missing loan as a $0 payment, never a special case.
Downside cases
- A higher rate on the replacement home, higher HOA dues, or comparable property taxes can reduce or eliminate the expected monthly savings.
- If payoff and selling costs exceed your current home’s sale price, net proceeds go negative — meaning you may need to bring funds to closing rather than receive any cash.
- Transaction costs materially reduce the cash actually released — this tool shows them separately, never hidden inside the monthly numbers.
Author: Todd McClean, Realtor® | Real Estate Investment Strategist, Mountainland Realty, Inc.. Reviewed August 14, 2026. This tool provides general real estate information and is not legal, tax, accounting, lending, securities, commodities, or financial-planning advice.
Frequently asked questions
Questions about this calculator.
Does downsizing always save money?
How much money would I have after downsizing?
I own my home free and clear. Can I still use this?
I have a very low mortgage rate. Won't downsizing still lower my payment?
Does entering my numbers here send them anywhere?
Related
Keep evaluating the decision.
Next step
Want to see this with real property numbers?
This calculator uses the numbers you enter. Want to see what your home may realistically sell for and how much equity you could carry forward? A seller strategy review adds a market-position and pricing assessment specific to your property.