Math
Interest rate arbitrage
$20K credit card debt at 24% APR = $4,800/yr in interest. Same $20K added to a mortgage at 7% = $1,400/yr. ~$3,400/yr saved. Real money on paper.
Debt Consolidation · the math, the risk
Tempting math.
Real risk.
Cash-out refi to pay off high-interest debt looks like an obvious win — trade 24% credit card APR for 7% mortgage. The math is real but the risk picture is more nuanced. Here's the honest read.
· How it works
Math first.
Then risk.
Trade-off 01
You converted unsecured debt to secured
Credit card debt is unsecured — lenders can sue but they can't take your house. Mortgage debt is secured BY your house. If you can't pay, foreclosure. The risk profile changed even though the dollar amount didn't.
Trade-off 02
Term extension
If you spread $20K over 30 years instead of 5 years (typical credit card payoff), you'll pay MORE total interest over time even at the lower rate. Run the actual amortization, not the headline rate.
Trade-off 03
Closing costs
Cash-out refi runs $5K-10K in closing costs. Add to the math. Sometimes the closing costs eat the first 1-2 years of savings.
Behavior
The relapse risk
Most consolidation buyers run the cards back up within 24 months. Now you have BOTH the mortgage debt AND new credit card debt. The math collapses. Behavior change is the prerequisite, not the math.
· Watch-outs
Four scenarios
where it backfires.
Pitfall 01
Consolidating without changing spending.
If the underlying behavior didn't change, the cards come back. Consolidation becomes a temporary cash-flow fix that worsens long-term position.
Pitfall 02
Doing it close to retirement.
Resetting your mortgage clock at 55 means you're paying mortgage into retirement. Risk profile changes. Often better: aggressive credit card payoff plan + smaller mortgage.
Pitfall 03
Forgetting reserves.
Cashing out eats your equity cushion. If anything happens (job loss, repair), you have less to fall back on. Don't cash out below ~80% LTV without planning reserves.
Pitfall 04
Skipping the alternatives.
Balance transfer cards (0% promotional APR), 401(k) loans, IDR student loan plans — sometimes a smaller surgical move beats a full refi. Run all options before pulling the cash-out trigger.
The math is real.
The behavior part is harder.
Five minutes. We model your debt consolidation against alternative paths and show you the honest math.