You’ve probably heard it before: “Your housing payment shouldn’t exceed 25% of your income.”
It’s one of those financial rules that gets repeated often… but rarely explained. Is it 25% of gross income? Net income? Does it include taxes and insurance? What about student loans, childcare, or retirement savings?
In today’s higher-rate environment, where mortgage payments can feel dramatically different than they did just a few years ago, the 25% rule deserves a closer look.
Let’s break down what that 25% really means and why the right number isn’t the same for everyone.
What the 25% Rule Was Meant to Do
The traditional 25% rule says your total housing costs - mortgage, property taxes, homeowners insurance, and possibly HOA fees - shouldn’t exceed 25% of your gross monthly income (the amount before taxes).
That number was designed to leave plenty of room for living expenses, savings, and lifestyle costs. Decades ago, it worked well in a lower-cost, lower-debt world.
Today, however, rising home prices and interest rates mean that strict numbers may set unrealistic expectations - or worse, push buyers to the edge of affordability.
A Better Way to Calculate What You Can Afford
Instead of focusing on a one-size-fits-all rule, think in terms of cash flow comfort. Ask yourself:
Are you maxing retirement savings?
Start with retirement savings. If taking on a mortgage would force you to scale back or pause contributions, that’s usually a sign the payment may be too aggressive. A home should support your long-term goals, not compete with them.
What does your debt-to-income ratio look like?
Next, consider your debt-to-income ratio. Lenders are often willing to approve higher ratios than what feels comfortable in everyday life. Qualifying for a loan doesn’t automatically mean the payment will feel sustainable month after month. Approval is about risk to the bank; affordability is about stability for you.
What season of life are you in?
Your stage of life also matters. If you’re paying for childcare, helping aging parents, planning for private school or college, or anticipating a job change, your financial bandwidth may already be stretched. The “right” housing number should reflect what’s happening in your life right now - not just what looks good on paper.
Do you value flexibility?
Finally, think about how much flexibility you want. A higher housing payment can limit career pivots, travel, entrepreneurial opportunities, or the option to retire earlier than expected. Housing is typically the least flexible line item in most budgets, so it’s worth making sure the commitment aligns with the life you want to build.
Avoid Becoming “House-Rich and Cash-Poor”
It’s easy to get emotionally attached to a dream home. But stretching too far can create years of financial pressure, especially in a high-rate environment.
When too much income flows toward housing:
- Emergency funds shrink
- Investment contributions pause
- Vacations feel stressful
- Home maintenance gets deferred
- Financial anxiety rises
Imagine earning $120,000 per year. The 25% rule suggests you could spend around $2,500 per month on housing. But if childcare, car payments, and student loans already take a bite out of your budget, you might only feel comfortable around $1,800. That difference could mean the ability to save for emergencies, vacations, or retirement instead of relying on credit.
And in today’s higher-rate environment, many buyers often focus on “What purchase price can I afford?”
Instead, the better question is: “What monthly payment allows my life to still feel spacious?”
A Better Goal: Sustainability
Instead of focusing on hitting a specific percentage of income, it’s more helpful to focus on sustainability. A healthy housing payment is one that allows you to save consistently, maintain a solid emergency fund, continue investing for retirement, and comfortably handle normal home repairs and maintenance.
Most importantly, it should support your lifestyle without creating ongoing financial stress. If your mortgage payment fits within a plan that allows all of those things to happen, the exact percentage of income becomes far less important than the overall stability it provides.
Buying a home is one of the largest financial decisions you’ll make. It deserves more than a one-line rule pulled from a blog post. The right housing number isn’t about what a lender approves. It’s about what supports your long-term goals without squeezing your present life.
At C. Beach Brown, we help clients look at big purchases in the context of their full financial picture. Ready to work with an advisor who can help you evaluate all of your options? Let’s talk. CLICK HERE to make an appointment.