How Much House Can I Afford? A Simple Homebuyer Guide

By Peter Eubank | Santa Cruz County Real Estate Advisor

One of the first questions almost every homebuyer asks is:

How much house can I actually afford?

The answer depends on more than just your income, but there are a few simple factors lenders look at that can help you estimate where you stand before getting pre-approved. Here’s the straightforward version.

(linked video)

1. Your Income Matters Most

A common lending benchmark is your debt-to-income ratio (DTI). In simple terms, this is how much of your monthly income can reasonably go toward housing and debt obligations. A rough conventional lending guideline is around 43% debt-to-income, though loan programs vary.

For example:

If your gross qualifying monthly income is $10,000, a lender may allow roughly $4,300/month toward housing-related costs. That monthly number typically includes:

• principal

• interest

• property taxes

• homeowners insurance

This is often referred to as PITI. That gives you a starting point, but not the full picture.

2. Credit Score Changes Everything

Your credit score directly impacts your financing options. Better credit generally means:

• lower interest rates

• lower monthly payments

• more loan flexibility

• stronger approval odds

Weaker credit doesn’t necessarily mean you can’t buy, but it may limit your options or increase borrowing costs.

The key point: The stronger your credit, the easier and cheaper financing usually becomes.

3. Income History Needs to Make Sense

Lenders want consistency, and in most cases, they’ll review your employment and income history to verify stability. That usually means looking at:

• recent tax returns

• W-2s or self-employment income

• employment history

• current income documentation

If your income is erratic, newly changed, or difficult to document, qualification can become more complicated.

4. Your Down Payment Changes Your Buying Power

Your available cash matters. A larger down payment can:

• reduce your loan amount

• improve approval odds

• lower monthly payments

• strengthen your offer in competitive markets

Even if two buyers earn the same income, the buyer with more cash available may be able to shop at a higher price point.

What Can Derail Your Loan?

This is where buyers get into trouble. A few common mistakes can wreck financing late in the process.

Making a big purchase during escrow

1. Do not finance a new car.

     2. Do not open major credit lines.

     3. Do not suddenly take on new debt.

Yes, these can absolutely change your approval profile.

Hiding financial issues

Be upfront with your lender. Things like:

• prior bankruptcy

• short sale history

• unpaid obligations

• child support obligations

• unusual income situations

These don’t automatically kill a deal, surprises do. Good lenders solve problems when they know about them early.

The Best Next Step

Online affordability calculators are useful for rough estimates, but they’re just that - rough. If you're serious about buying, the real next step is getting properly pre-approved with a local lender who can evaluate your actual financial picture to give you a real number, not a guess.

Final Thoughts

Home affordability comes down to a few core variables:

• income

• debt

• credit

• down payment

• financial stability

The faster you understand those numbers, the faster you can shop confidently. If you're buying in Santa Cruz County and want help understanding what your budget looks like, I’m happy to help connect you with strong local lending resources.

Home buyer guide link - click for more info