Michigan Buy-Before-You-Sell Calculator

Michigan Buy-Before-You-Sell Calculator — Move Up Without a Fire Sale

The short answer: whether you can buy before you sell comes down to two questions — can you qualify carrying both payments, and can you reach your current equity before the old home closes. This buy before you sell calculator answers both: it runs your debt-to-income ratio carrying both homes (and again with rental income), and it estimates the equity you can tap now through a bridge loan or HELOC — usable to about 80% combined LTV and carried interest-only — versus the larger amount you net only after the sale, and it sizes the double-payment exposure during the overlap so you know the real carry before you commit.

My name is Edward Kalavitz, creator of this buy before you sell calculator. As a dual-licensed Michigan Realtor and Mortgage Loan Originator, I help move-up buyers win the next home without a contingent offer that loses to cash — and without being forced to sell first and scramble for a place to live.

See If You Can Buy Before You Sell

When Does Buying Before Selling Make Sense?

The buy before you sell calculator answers the move-up buyer’s hardest question: can you buy the next home without selling the current one first? Buying before you sell makes sense when you have the income to carry both payments (or rent the departing home), enough equity to access for the down payment, and a market where a contingent offer would lose. If you’re tight on any of those, the buy before you sell calculator shows it before you fall in love with a house — and you can plan a sell-first or bridge strategy instead.

There are three paths to compare: buy first (carry both, then sell), sell first (then buy with the proceeds), or a bridge or HELOC to tap equity early. Most move-up buyers who want to buy before you sell land on a bridge or a departing-residence rental strategy — run your numbers in the buy before you sell calculator, then call me to map which one fits your timeline and your equity.

Will the Rent From My Old House Help Me Qualify?

Often, yes — and it’s the most common way to make a buy-before-you-sell work. If you keep your current home and rent it out with a documented lease, lenders typically credit about 75% of that rent against your departing mortgage payment. In the buy before you sell calculator above, a departing payment of $1,450 offset by 75% of an $1,800 rent nets to just $100 in your debt-to-income ratio — the difference between a deal that’s too tight and one that qualifies. The rules differ for a pending sale versus a retained rental; if you intend to keep the home as a rental, expect to document the lease and possibly show reserves, while a home that’s under contract to sell may have its payment excluded entirely.

How Much of My Equity Can I Use Before I Sell?

This is the second half of buying before you sell: your equity is real, but most of it is locked up until the old home closes. Before the sale, you can usually tap your equity up to a combined loan-to-value of about 80% through a bridge loan or a HELOC, which the buy before you sell calculator shows as your “usable equity now.” After the sale, you net more — your value minus the payoff and estimated selling costs — shown as “net equity after you sell.” The gap between those two numbers is the cash you simply can’t touch until closing, which is exactly why the timing of a move-up purchase has to be planned, not improvised.

Bridge Loan vs. HELOC vs. Sell First

Reserves — and What If It Doesn’t Sell?

Carrying two homes means a lender wants to see reserves — enough in the bank to cover both payments for a period after closing. And you should plan for the case the old home lingers: you keep both payments until it sells, so the buy before you sell calculator’s DTI and equity numbers are the start of a risk conversation, not the end of one. If your home doesn’t sell on your timeline, the options are to rent it, adjust the price, or refinance a bridge — all of which are easier to handle when you mapped them before you bought, instead of after.

Worked Example: A Move From a $320,000 Home to a $450,000 Home

A move-up buyer owns a $320,000 home with a $150,000 balance and a $1,450 payment, earns $11,000/mo with $650 of other debts, and wants a $450,000 home at 10% down, 6.5%. Here is how the buy before you sell calculator reads it:

Illustrative figures. Your result depends on your inputs, your lender’s DTI ceiling, and your bridge/HELOC terms. Run your own move in the buy before you sell calculator above.

The story the buy before you sell calculator tells here is the classic move-up squeeze: carrying both at 49% is too tight for most programs, but renting the departing home drops it to a comfortable 37% — and there’s about $106,000 in equity you can put to work now, well before the $147,600 you’ll net at closing. Knowing those four numbers before you write an offer is what turns a stressful move into a planned one.

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