Model the Overlap on Net Proceeds, Not Sale Price
Program and regulatory figures verified September 25, 2026. Details change; confirm your scenario with us.
The number that matters is not what the house sells for. It is what is left once the payoff, the costs and the tax picture have all had their turn.
Why net proceeds is the number
Every buy-before-you-sell structure except keeping the home settles against the sale.
- A bridge loan is repaid in full from the proceeds.
- A second mortgage or equity line taken for the down payment is paid off at that closing.
- A recast on the new mortgage is funded by applying proceeds to principal, so the payment reduction tracks the size of the proceeds.
Which means the planning number is net, not gross.
The Massachusetts addition
In most states the subtractions are payoff, transfer costs and ordinary costs of sale. Massachusetts adds a possibility that is easy to miss because it arrives later: the same sale can generate a capital gain that lands in that year's taxable income above the federal exclusion, and mass.gov sets the 2026 surtax threshold at income exceeding $1,107,750, with 4% applying above it.
That liability does not appear on the settlement statement. It appears at tax time, against money you may already have spent retiring a bridge. See the surtax page.
How to model it
- Expected sale price.
- Less the existing mortgage payoff.
- Less any second mortgage or equity line taken to fund the down payment.
- Less ordinary costs of sale.
- Then take the result to your CPA and ask what the gain does to your tax year.
Step five is not optional on a long-held Massachusetts home, and it is the step a lender cannot do for you. What we can do is make sure it happens while the financing is still being designed.
Matching the answer to a structure
| If net proceeds are | Then |
|---|---|
| Comfortably above the bridge or second you would need | Either equity route works; pick on timing |
| Enough for a meaningful principal reduction | Carry both and recast |
| Thin once the tax picture is included | Look hard at keeping the home, which produces no proceeds and realises no gain this year |
See the structures page, the rental conversion page and the calculator.
Frequently asked questions
Why should I plan my Massachusetts move-up on net proceeds?
Because every buy-before-you-sell structure except keeping the home settles against the sale. A bridge loan is repaid from proceeds, a second mortgage is paid off at that closing, and a recast is funded by applying proceeds to principal.
What does Massachusetts add to the usual net-proceeds arithmetic?
A possible surtax liability from the same sale. A capital gain above the federal exclusion lands in that year's taxable income, and mass.gov puts the 2026 threshold at income exceeding $1,107,750 with 4% applying above it. That liability arrives at tax time rather than on the settlement statement.
What if net proceeds come out thin?
Usually change structure rather than increase the loan. Keeping the departing home as a rental produces no proceeds but also realises no gain in that tax year, and under Fannie Mae B3-3.8-05 the property can offset its own payment at 75% of gross rent less its PITIA.
Mike Certo · NMLS #260555 · Cornerstone First Mortgage NMLS #173855 · Equal Housing Lender. Educational content about financing, not a loan commitment and not legal, tax, or real estate advice. The Massachusetts surtax threshold is set by the Commonwealth and indexed annually, and whether a home sale reaches it depends entirely on your facts; your CPA, your closing attorney, and your real estate agent each handle their own part. Loans are subject to borrower and property qualification.