By J.R. Conway, NMLS #147631 | CM Mortgage Services Inc.

Buying a Home With Commission, Bonus, or Overtime Income in Chester County PA: How Conventional Lenders Calculate What You Earn

I have had borrowers say some version of this to me more times than I can count.

“J.R., I made $115,000 last year. Why are you only using $100,000 to qualify me?”

It is a fair question.

The answer is that mortgage qualifying income and the income printed on last year’s W2 are not always the same number.

If you earn a straight salary, calculating your income is usually pretty simple.

If a meaningful part of your paycheck comes from commission, bonuses, overtime, or other income that changes from month to month, I have another job to do.

I have to determine how much of that income is stable enough and predictable enough to reasonably use toward a 30 year mortgage.

That means looking backward before I can tell you what number we can use going forward.

I am J.R. Conway, owner and vice president of CM Mortgage Services Inc., a second generation, family owned mortgage brokerage located in West Chester, Pennsylvania. I have been helping homebuyers and homeowners navigate mortgage financing for more than 20 years, with a particular focus on Chester County and the surrounding communities. I personally guide my clients from the first conversation through settlement, helping them understand their financing options, monthly payment, cash needed to close, and the local factors that can affect a home purchase. NMLS #147631.

Variable income is one of the best examples of why a real mortgage preapproval involves more than looking at your annual salary and running a credit report.

Your Base Salary and Variable Income Are Two Different Things

Let us start with the easiest example.

Suppose you have a base salary of $80,000.

That base income is generally straightforward when it is fixed, documented, and expected to continue.

Now suppose you also earned:

$18,000 in commission

$8,000 in bonus income

$5,000 in overtime

Your W2 may show total earnings around $111,000.

That does not automatically mean I can divide $111,000 by 12 and use $9,250 per month to qualify you.

I need to separate the different income sources and analyze them individually.

Fannie Mae specifically treats bonus, commission, overtime, and tip income as variable income and requires the lender to analyze the frequency, history, and trend before determining the qualifying monthly amount.

That distinction matters.

Your base salary may be $80,000.

Your mortgage qualifying income may eventually include some or all of the other $31,000.

But first I need to prove that those earnings are stable enough to count.

How Much History Do I Need?

For Fannie Mae conventional financing, a two year history of bonus, commission, or overtime income is recommended.

However, Fannie Mae does allow income received for a shorter period to potentially be considered when there are positive factors supporting it, as long as the history is at least 12 months.

Freddie Mac also requires at least a 12 month history when using bonus, commission, overtime, or tip income.

That gives us some flexibility.

You do not necessarily need to have earned the exact same commission for two full years.

You do not necessarily have to work for the exact same employer for your entire career.

But I need enough history to show that the income is real, recurring, and reasonably expected to continue.

If you started receiving commission three months ago, that is a very different situation from someone who has earned commission consistently for five years.

Why Your Current Paystub Matters So Much

Your W2 tells me what happened last year.

Your current paystub tells me what is happening now.

For Fannie Mae, the lender typically documents this type of income using the most recent paystub and two years of W2s, or an acceptable verification of employment. The lender then compares the current year to date earnings with prior earnings to determine the trend.

This is why I ask for your current paystub even when you already sent me the W2.

Imagine you earned $30,000 in commission last year.

That sounds great.

But now it is August and you have only earned $10,000 in commission so far this year.

I cannot simply ignore what is happening this year and use last year’s $30,000 because it gives us a better approval.

We have to investigate the decline.

On the other hand, maybe you earned:

2024 commission: $18,000

2025 commission: $22,000

Current 2026 earnings are on pace for: $25,000

That tells a very different story.

The income appears stable or increasing.

That trend gives the lender more confidence that the income is likely to continue.

Stable or Increasing Income Is the Easier Conversation

Fannie Mae’s current guideline is straightforward when variable income is stable or increasing.

The lender calculates an average using current year to date earnings and prior earnings, with at least 12 months of income included in the calculation.

The important word is average.

If you had an unusually strong month and earned a $10,000 commission check, I normally cannot take that one month and assume you will earn $10,000 every month for the rest of the year.

We look at the pattern.

The same thing applies to overtime.

Maybe your employer was short staffed for three months and you worked 20 hours of overtime every week.

That was great income.

But if the company hired five new employees and your overtime has dropped back to two hours a week, I need to qualify you based on what the income is realistically doing now.

Mortgage underwriting is trying to answer one basic question:

Is this income likely to be available to help you make the mortgage payment going forward?

Declining Income Is Where Things Get More Complicated

This is one of the most important parts of the article.

If your commission, bonus, or overtime income is declining, I cannot simply average the higher years together and pretend the decline did not happen.

Under Fannie Mae’s current guideline, if variable income has decreased, the lender must determine that the income has stabilized after the decline. If it has not stabilized, the income may not be eligible for qualifying at all. When it has stabilized, the calculation is based on the income earned since the stabilization occurred.

This is where a borrower can say:

“But I made $120,000 last year.”

And I have to say:

“I understand. But we need to look at what you are earning now.”

That is not me trying to lower your approval.

That is the conventional mortgage guideline.

A Realistic Commission Income Example

Let us say you have an $80,000 base salary.

Last year you also earned $30,000 in commission.

Your total W2 income was approximately:

$110,000

You naturally assume that is the income we will use.

But now suppose your current year commission is trending closer to $18,000.

Your employer changed the compensation plan.

Your territory changed.

Sales slowed down.

Whatever the reason, the current number is materially lower.

I cannot automatically qualify you using the prior $30,000 commission amount.

We may need to use a lower amount that reflects the current stable level.

Instead of qualifying around $110,000, perhaps the supportable income is closer to:

$98,000

That difference is $12,000 per year.

On a monthly basis, that is:

$1,000 less qualifying income

That can make a real difference in how much housing payment fits within your debt to income ratio.

It can change your maximum purchase price.

It can change how much other monthly debt you can carry.

And it can change whether the home you were looking at actually works.

This is why I want to calculate the income before you start shopping.

My [Mortgage Preapproval Chester County PA guide] explains why I review income, assets, credit, and debts before a buyer begins making offers. Your preapproval needs to reflect income we can actually document and use, not simply the highest number that appears on a tax form.

How Bonus Income Is Calculated

Bonus income creates another common misunderstanding.

Suppose your employer pays an annual bonus every March.

You received:

2024 bonus: $8,000

2025 bonus: $10,000

2026 bonus: $11,000

The fact that you received $11,000 in March does not mean I add $11,000 to your March income and treat that month as your normal earnings.

Fannie Mae specifically requires the lender to account for the frequency of bonus income. An annual bonus is converted into an appropriate monthly amount for purposes of the income analysis.

We look at the history and trend.

If the bonus has been received consistently and remains supported, it may be very usable income.

If the employer tells us the bonus program has been eliminated, we have a different problem.

How Overtime Income Is Treated

Overtime works much the same way.

The question is not:

“Did you earn overtime?”

The question is:

“Do you have a history of earning overtime, what does that history look like, and what is happening now?”

A nurse, police officer, manufacturing employee, technician, or other hourly worker may earn a significant amount of overtime every year.

That income can absolutely matter for mortgage qualification when the history and current earnings support it.

But if last year’s overtime was caused by a temporary staffing shortage that no longer exists, I need to account for that change.

Freddie Mac also analyzes fluctuating employment income based on whether the earnings are consistent, increasing, or declining. Its guidelines require lenders to evaluate the history and current income rather than simply taking the highest year.

What If I Recently Changed Jobs?

Changing jobs does not automatically disqualify you from using income.

Fannie Mae allows borrowers who change jobs frequently to still have reliable employment when the overall income is consistent and predictable.

But variable compensation makes the analysis more important.

Suppose you have worked in pharmaceutical sales for six years.

You changed employers four months ago.

Your new position still has a base salary plus commission.

That is different from someone who worked a salaried office job for ten years and became a commissioned salesperson four months ago.

The first borrower may have a long history of earning the same type of income.

The second borrower is new to that income structure.

I need to look at the complete employment history, not simply the start date shown on the latest paystub.

What Documents Will I Ask For?

For most W2 borrowers earning commission, bonus, or overtime, I am going to start with:

1. Your most recent paystub showing year to date earnings
2. Your W2s from the previous two years
3. Your employment history
4. Any documentation needed to clarify how you are compensated
5. A verification of employment when required

Fannie Mae specifically requires the current income and historical income to be documented so the lender can compare the trend.

Freddie Mac’s current documentation rules likewise require the year to date earnings to be separated by income type so base pay, bonus, overtime, tips, and commissions can be analyzed correctly.

Do not worry about doing the calculation yourself.

Send me the documents.

I will break the income apart and determine what we can reasonably use.

Why I Do Not Want You Shopping Based on Last Year’s W2

This is the practical lesson.

If your W2 says $125,000, you might plug $125,000 into an online mortgage calculator.

The calculator gives you a purchase price.

You start looking at homes.

You find one you love.

Then you call me.

I review the income and determine that the qualifying number is actually $105,000.

Now we have a problem that could have been avoided before you ever walked through the house.

I would much rather have that conversation at the beginning.

Your current [Conventional Loan Requirements Chester County PA guide] explains that employment and income are one of the core parts of conventional underwriting, along with credit, debt to income, and available funds.

The pieces work together.

Strong Income Does Not Mean You Should Max Out the Approval

There is another side to this.

Sometimes the borrower has plenty of qualifying income.

They earn a strong salary, commission has been increasing for years, credit is excellent, and the automated underwriting system gives us plenty of room.

That does not mean I want to push the buyer to the absolute highest purchase price available.

Commission and bonus income can change.

Markets change.

Companies change compensation plans.

Overtime can disappear.

If part of your income fluctuates, I think it is especially important to ask yourself whether the payment still feels comfortable during a slower year.

Qualifying for the mortgage and being comfortable with the mortgage are two different things.

That is something I talk about throughout my [Chester County Home Buyer’s Guide], which walks buyers through preapproval, credit, financing, monthly payment, offers, appraisals, closing costs, and settlement.

Frequently Asked Questions About Commission, Bonus, and Overtime Income

Can I use commission income to qualify for a conventional mortgage?

Yes. Commission income may be used when the lender can document an acceptable history, determine the income is stable and predictable, and support the amount being used. Fannie Mae recommends a two year history but may consider at least 12 months when positive factors support the shorter history.

Do I need two full years of commission income?

Not always. Under current Fannie Mae guidelines, income received for at least 12 months may potentially be accepted when positive factors support the shorter history. Freddie Mac also requires at least 12 months of history for bonus, commission, overtime, and tip income.

Can my annual bonus be used for a mortgage?

Yes, when there is sufficient history and the bonus is considered stable enough to qualify. The lender analyzes how frequently the bonus is paid and converts it into an appropriate monthly amount rather than treating the entire annual bonus as one month’s normal income.

Can overtime income count toward mortgage qualification?

Yes. Consistent overtime with an acceptable history can be used. The lender compares current year to date overtime with prior earnings to determine whether the income is stable, increasing, or declining.

What happens if my commission income is declining?

Declining income requires additional analysis. Under Fannie Mae guidelines, the lender must determine that the income has stabilized after the decline. If it has not stabilized, the income may not be eligible for qualifying.

Why is my mortgage qualifying income lower than my W2 income?

Your W2 may include variable earnings that cannot simply be divided by 12 and used as monthly income. The lender separates base pay from commission, bonus, overtime, and other variable earnings and evaluates the history and current trend of each income source.

Can I qualify after changing jobs?

Potentially, yes. A job change does not automatically make the income unusable. The lender reviews the borrower’s overall employment history, type of compensation, and whether the income remains consistent and predictable.

Should I get preapproved before looking at homes if I earn commission?

Absolutely. Variable income should be calculated before you establish a serious purchase price. Otherwise, you may be shopping based on gross annual earnings that are different from the qualifying income the mortgage guidelines allow us to use.

Let Me Calculate the Income Before You Pick the House

If your paycheck includes commission, bonus, overtime, or another type of variable income, do not assume you qualify based on last year’s W2.

And do not assume the lender cannot use the income either.

Let me look at it.

Sometimes I can use more income than the borrower expected.

Sometimes I have to use less.

Sometimes the difference between Fannie Mae and Freddie Mac guidelines can matter.

The important thing is figuring it out before you start making offers.

That is what a real preapproval is supposed to do.

I want you shopping with a payment and purchase price we can actually support when the file gets to underwriting.

J.R. Conway is the owner and vice president of CM Mortgage Services Inc., a second generation, family owned mortgage brokerage serving homebuyers and homeowners throughout Chester County and the surrounding communities. With more than 20 years of mortgage experience, J.R. personally guides his clients from the initial conversation through settlement. NMLS #147631.

To discuss your income, mortgage qualification, or homebuying plan, start your secure mortgage application or call CM Mortgage Services Inc. at 610 430 6852.

CM Mortgage Services Inc. | Company NMLS #143821

All loans subject to approval. Equal Housing Lender.