Buying a House While Selling Yours in Texas — Bridge Loan vs. HELOC vs. Contingency

I'm Bond Peter Njoku (NMLS #2670329), and this is one of the trickiest timing problems I help move-up buyers solve across Collin County and the wider DFW metro: you've found your next home, but your current one hasn't sold yet. In competitive DFW submarkets — Rockwall, Prosper, McKinney — average days on market for move-up price points often sits under 40 days, which means a sale-contingent offer frequently loses to a buyer who doesn't need one. Here are your three real options, with actual costs and timelines, so you can pick the one that fits your equity position and how fast your current home is likely to sell.

What Are My Options for Buying Before I Sell in Texas?

How Does a Bridge Loan Work?

A bridge loan taps the equity in your current home to fund the down payment and closing costs on your new home before your current one sells. Most Texas lenders want to see at least 10-15% equity in your current property, and you'll need to demonstrate — through your pre-approval — that you can carry both mortgage payments at the same time during the overlap period. Expect origination fees of roughly 1.5-3% of the loan amount, plus 8-10% annual interest while you're carrying two properties. Because that interest accrues fast, a bridge loan makes the most sense when your current home is priced to sell quickly and you're confident it'll close within a few months, not a few quarters.

How Does a HELOC Compare to a Bridge Loan?

A home equity line of credit, opened on your current home before you list it, is often the cheaper alternative to a bridge loan — lower rates, typically an interest-only draw period, and little or no origination fee. The catch is timing: you need to open the HELOC while you still own and haven't yet listed your current home, since lenders are far more cautious about extending one once your home is under contract to sell. If you're planning a move 3-6 months out, opening a HELOC early is often the smartest, lowest-cost move available.

When Does a Sale-Contingent Offer Still Make Sense?

A home sale contingency makes your purchase offer dependent on your current home selling first, and it costs you nothing upfront — but it weakens your offer in almost every competitive situation. In DFW's faster-moving submarkets, average days on market for move-up price points often runs under 40 days, and a seller with multiple offers will typically pass over the contingent one first. That said, a contingency can still work in slower-moving price tiers, less competitive cities, or — most importantly — once your current home is already under contract rather than merely listed. A "contingent on sale, home is already under contract" offer is far more attractive to sellers than a plain contingency with no offer yet in hand.

How Does DTI Qualification Work When I'm Carrying Two Mortgages?

Your lender calculates your debt-to-income ratio using both mortgage payments together — your current one and your new one — plus any bridge loan or HELOC payment, against your gross monthly income. This is where timing matters most: if your current home is already under contract to sell, many lenders will exclude that mortgage payment from your DTI calculation entirely, since it's expected to be paid off at your closing. If it's only listed and not yet under contract, most lenders count the full existing payment, which can meaningfully shrink how much home you qualify to buy in the interim. This is exactly why I encourage move-up clients to time their new-home offer as close as possible to when their current home goes under contract, not the moment it's simply listed.

What Does the Timeline Actually Look Like?

Plan for roughly 45 to 75 days from listing your current home to closing on both properties. Texas title companies are experienced at coordinating back-to-back closings — selling your current home in the morning and closing on your new purchase that same afternoon, routing the sale proceeds directly into your new purchase without a funding gap. That coordinated same-day close is often the cleanest outcome and avoids carrying two mortgages for more than a few weeks, if at all.

Named Scenario: A Move-Up Buyer in McKinney

Here's a composite scenario built from clients I've worked with. A family in McKinney owned a home worth $410,000 with $270,000 remaining on their mortgage — about $140,000 in equity — and wanted to move up to a $520,000 home in the same school district before their current home sold. We used a bridge loan against $65,000 of their equity (roughly 46% of their available equity, within the 10-15%-minimum-equity guideline lenders require) to cover their down payment and closing costs on the new purchase, letting them make a strong, non-contingent offer.

Their bridge loan carried a 2% origination fee ($1,300) plus 9% annual interest, which for the 62 days it took their old home to close worked out to about $995 in interest — a total bridge cost of roughly $2,295. Compare that to the risk of losing their preferred new-construction lot to another buyer with a non-contingent offer: for this family, the bridge cost was a small price for certainty. Once their old home closed 62 days later, the bridge loan was paid off in full from the sale proceeds, and they moved forward with just their new 30-year mortgage on the $520,000 home.

How Do I Decide Which Option Is Right for Me?

It comes down to three questions: how much equity do you have, how fast is your current home realistically going to sell, and how competitive is the market you're buying into? I walk every move-up client through this decision individually, because the right answer for a Rockwall seller in a 30-day market looks very different from the right answer for someone in a slower-moving price tier. If you're shopping in one of DFW's move-up corridors, my McKinney loan page and mortgage calculators are a good place to start running your own numbers.