Are You Ready to Buy a House? (What Getting Ready Actually Looks Like When Your Paycheck Isn't the Same Every Month)

by Brian Wittman

Someone I know is thinking about buying. He is moving in with his girlfriend, they want a bigger family, and when I asked him what he actually wants, he did not say a number. He said he wants a house big enough for that family that does not break his bank, and something he can hand down to his kids someday.

Then he asked the question everybody asks eventually. How do I know when I am ready?

Here is what struck me about that conversation. He started with the life. Almost every guide he could find online starts with a ratio.

How do you know when you're ready to buy a house?

You are ready when you know what you want your life to look like in the next few years and you have worked backward from that to a monthly payment you can carry on your worst month, not your best one. Readiness is not a credit score, a down payment amount, or a percentage of your gross income. Those are inputs. Readiness is whether the house serves the plan and whether the payment survives a month where the overtime does not come.

That reframe matters most for people whose income moves. If your pay is different every month, the standard readiness test was not written with you in mind, and treating it like gospel will either scare you off a house you could comfortably carry or push you into one you cannot.

The 28% rule was not built for a paycheck that moves

Go read what the institutions publish and you will find remarkable agreement. HUD, the CFPB, the big lenders, and the title companies all lay out roughly the same nine to thirteen steps, and step one is almost always some version of assessing your financial readiness. Then almost all of them reduce that step to one number: keep your housing costs under about 28% of your gross monthly income, and have something like 2% to 5% of the price ready for closing costs.

The 28/36 guideline is genuinely industry standard. It is not made up and it is not a trick. But understand what it was built to do. It is a fast screen designed for an average household with an average debt load and an average savings rate. It was built to be applied to thousands of files quickly, not to be right about yours.

Which means it misses in both directions, and this is the part that almost nobody says out loud.

I ran my own numbers and my wife's through my own affordability math and then against a lender's maximum approval. The approval came in lower than what we knew we could carry. Not because anything was wrong with our file. Because we had very little debt, we kept our expenses tight, and we saved aggressively, and the formula does not have a place to put any of that. It treated us like the average household we are not.

It misses the other way too, and that failure is the more expensive one. Plenty of people get approved for a number well above what their life can actually absorb, take it as permission, and spend the next few years finding out. That gap between what you're approved for versus what you can actually afford is the single most useful thing to understand before you start looking at houses.

Nobody in the transaction is paid to tell you to buy less. That is not an accusation, it is just how the roles are built, and I hold the same licenses as everyone else in that sentence.

Start with the life, then work backward to the money

The reason my coworker's answer was a good one is that he described a life and not a listing. Bigger family. Does not break the bank. Something to pass on.

Work backward from that and the questions get concrete fast. How many bedrooms does that family actually need. How long do you plan to be in this house. What does the neighborhood need to have. Only then, what does that cost, and what does that payment do to the rest of your month.

Here is the thing I told him that he had not considered. You have to think about bedroom count even while you are renting. If you need three bedrooms, you are going to pay for three bedrooms either way, and bigger rentals are typically more expensive per month than smaller ones. So if you already know you are putting down roots here, that rent number can argue for a shorter runway to buying, not a longer one. Renting and buying are not two separate decisions. They are the same decision looked at from two points on one timeline.

And sometimes the honest answer at the end of that exercise is keep renting. If what you want is to keep the option to travel, or to move for work, or to just not be responsible for a roof yet, renting with a plan is a completely legitimate outcome. A house is a tool for the life you are trying to build. It is not the goal, and it is not a scorecard. If you are genuinely torn, work through keep renting or buy first and come back.

What will the bank actually count as income?

If your pay is salary, this section is short. If it is not, this is where the surprises live.

As a general rule, and this varies by lender and by loan program so confirm with yours, lenders want to see that variable income is established and likely to continue. In practice that usually means a history of roughly two years, and the number they use is typically an average rather than your best stretch. Overtime, shift differential, bonus, and side income all tend to get treated this way.

Two things follow from that, and they are worth knowing early rather than at pre-approval.

The first is that a big recent spike may not help as much as you expect, because averaging pulls it back toward your baseline. The second is that documentation is the whole game. Income you cannot prove on paper is income the file cannot use, which is why cash and unreported side work quietly cost people borrowing power they think they have. The full mechanics of using overtime income to qualify for a mortgage are worth reading before you talk to anyone, because knowing what will be counted changes what you go looking at.

What number should you actually pick?

Take whatever the approval says and set it aside for a minute.

Build the real number from the bottom. Start with your take-home on a normal month, not a good one. Subtract what your life actually costs, including the things people leave off the spreadsheet because they feel optional and are not. What is left is what a house payment can occupy, and it should not occupy all of it.

Then look at the full payment, not the principal and interest. Taxes and insurance sit inside that monthly number, and in the Chicago suburbs the tax line is large enough to move the decision by itself.

The failure mode here is not dramatic. Nobody gets foreclosed on because they bought at the top of their approval. What happens is quieter. You start saying no to things you used to say yes to. You put off the dentist, the car repair, the thing on the house that is getting worse. You do math at two in the morning. That is what how to avoid being house poor is really about, and the people who avoid it are not the highest earners. They are the ones who knew their real number before they went shopping.

How you pay for it is a separate decision from what you buy

Once you have a number, the financing questions show up, and they are decisions rather than defaults.

Waiting to save 20% so you can avoid mortgage insurance sounds responsible, and sometimes it is. But it is a cost either way, because in a market that is moving, the target moves while you save. Understanding whether PMI is worth it is really a question about which cost you would rather pay, a known and temporary one now or an unknown and open-ended one later.

The rate question works the same way. There is a real argument for buying the house and refinancing later, and there is a real argument for paying to lower the rate up front. What how interest rate buydowns work comes down to is how long you plan to be in the house, because that is what decides whether the money you spend today ever pays you back. And the reason to be careful with marry the house, date the rate as a slogan is that it quietly assumes a refinance you cannot schedule and nobody can promise you.

None of these have a universally right answer. They have an answer for the next five to ten years of your particular life, which is why they come after the life conversation and not before it.

What you hand over at closing, and what you keep

This is the one I got wrong on paper and right in practice, and it is my own money so I can tell you exactly what happened.

The plan was 20% down using the full proceeds from selling our old house. Clean, responsible, exactly what you are supposed to do. Instead we held back 5% and kept it as cash for move-in costs.

What that cost us: about $30 a month in mortgage insurance, and about $70 a month more in total payment from putting 5% less down. What it bought us: not starting our first year in a new house by putting a refrigerator and a fence on a credit card.

Seventy dollars a month for that trade was not close. And it is the exact shape of the gap this whole article is about. The formula says maximize the down payment. Your actual life says liquidity in month one is worth more than a slightly smaller balance, because the balance is not what is going to go wrong first.

The first twelve months are where people get surprised

You closed. Here is what the first year actually does.

Your payment is going to move even though your rate is fixed, because taxes and insurance are inside it and they change. That is the single most common panicked phone call in year one, and why your escrow payment went up explains a mechanism that catches people who did nothing wrong. In this area, a reassessment can make that swing bigger than you would guess.

Then there is everything the closing statement did not tell you about. The stuff that adds up in the first year is real and it is knowable in advance, which is the entire point of what it really costs to own a home in year one.

And this is where reserves earn their keep. In the fire service you plan for the 90% you can see coming. The calls you train for, the ones that follow a pattern. But it is the 10% you never trained for that separates the people who were actually ready from the people who thought they were. Homeownership works the same way. Almost everybody plans for the payment. Almost nobody plans for the February the furnace quits, the job that changes, the family situation that reorders everything. The people who came through those moments in one piece were not luckier. They had a plan that had room in it.

If your income already moves, this is not optional advice. Reserves are how a variable paycheck stops being a source of anxiety and starts being just a fact about your budget.

What happens after year one?

Two things start, and they are worth knowing about now even though you do not act on either one yet.

The first is equity. Equity is simply the difference between what the house is worth and what you still owe on it, and it grows two ways at once: you pay the balance down, and the value moves. It is not free money and it is not a scoreboard. It is a tool that becomes available to you later, and there are good uses for it and bad ones. That is a conversation for when you actually have some.

The second is a rhythm. Year two is when a good relationship with whoever helped you buy should start looking like an annual check rather than silence. Assessment years come around and need watching. Rates move and occasionally a refinance is worth running the math on. Your protection stops matching your household the moment a kid arrives or your income changes, and almost nobody updates it on their own. Those are the years where the decisions you made at closing either compound in your favor or quietly stop fitting, and there is no reason to navigate that alone. An agent has no particular reason to call you in year four. I think that is a strange way to run a relationship.

The Bottom Line

Readiness is not a ratio. The 28% rule is a screen built for an average household, and if your income moves you are not the household it was built for. It will tell some disciplined savers they cannot afford a house they could carry easily, and it will tell some stretched buyers they can afford one they cannot.

The honest version takes longer and works better. Start with the life you are actually trying to build. Work backward to a payment that survives your worst month. Find out what a lender will count before you fall for a house. Pick your number from the bottom up instead of the top down. Treat the financing questions as decisions instead of defaults. Keep some cash on the day you close. Plan for the 90%, and be ready for the 10%.

If you want the transaction itself laid out in sequence once you are past the readiness question, how to buy a house in the Chicago suburbs walks the steps in order.

Frequently Asked Questions

How do lenders verify overtime income?

Generally through your pay stubs, W-2s, and often a written verification from your employer, with the goal of establishing both a history and a reasonable expectation that the income continues. The specific documentation varies by lender and loan program, so confirm the requirements with whoever is running your file before you start gathering paperwork.

How do lenders calculate variable income for a mortgage?

Most commonly by averaging it over a look-back period rather than using your most recent or your best stretch, and typically they want to see roughly two years of history. That is why a recent spike in overtime often helps less than people expect. Requirements differ by program, so treat this as the general shape rather than your specific answer.

What percentage of my income should go to a house payment?

The widely used industry guideline is about 28% of gross monthly income toward housing and about 36% toward total debt. It is a reasonable starting screen and a poor finishing answer, because it does not know your savings rate, your actual expenses, or how much your income swings. Build your number from your take-home and your real monthly costs, then compare it to the guideline rather than the other way around.

How much do I need for closing costs?

The commonly quoted range is roughly 2% to 5% of the purchase price, and where you land inside it depends on your loan type, your lender, and what gets negotiated. Plan for the higher end rather than the lower one, and remember that closing costs and your down payment are two separate piles of money.

Which loan programs work best for hourly employees?

There is no single program built for hourly workers. What matters far more is how your particular income is documented and averaged, which is a lender and program question rather than a job-title question. The useful move is to find someone who has actually worked with shift and overtime income before, because the difference between a lender who understands it and one who does not can change what you qualify for.

Is it cheaper to rent something bigger or to buy?

It depends on your market and your timeline, but the comparison people skip is the right one to run. If your family needs a certain number of bedrooms, you will pay for those bedrooms either way, and larger rentals typically carry a meaningful premium. If you already know you are staying in the area for years, that premium is worth putting next to a mortgage payment before you assume renting is the cheaper path.

What if my income drops after I buy?

This is exactly what reserves are for, and it is the reason to buy below your approval rather than at it. Build the payment around a normal month instead of a strong one, keep cash on hand through closing, and know your options before you need them. If it does happen, the worst thing you can do is wait until you have missed a payment to start talking to people.

Want to Run Your Own Numbers?

Start with the How Much Home Can I Afford calculator. It is free, nothing is gated behind a form, and it builds the number the way this article describes: up from what your life actually costs, instead of down from a percentage of your gross pay.

Run it and one of two things happens. Either the number makes sense to you and you are done, which is a good outcome and costs you nothing. Or you look at it and think that it still does not account for how your pay actually works, which month it lands, or what you are carrying that a form never asked about.

That second one is the conversation worth having, and it is the one I like mapping out most. Bring your real numbers and we will build the payment from your worst month up. Sometimes that ends with a plan to buy this spring. Sometimes it ends with me telling you to keep renting for another year and here is exactly what to do with the difference. Both are wins, and you will know which one you are in within about twenty minutes.

Schedule time with me if you want to try seeing what your plan should look like.

Brian Wittman is a licensed real estate broker (Real Broker LLC), mortgage loan originator (NMLS #2646598, NEXA Mortgage, LLC, Equal Housing Lender), and life insurance producer (Levinson & Associates). This article is for educational purposes only and is not financial, lending, tax, or legal advice, an offer, or a commitment to lend; all loans are subject to credit approval. Information is accurate as of the publication date; for current details and full disclosures, visit https://bluejeanbroker.com/disclosures.