Can I rent out my house and buy another?

You can usually rent out your Utah house and buy another, and the order you do it in decides whether the plan survives contact with a lender.

The appeal is obvious. You keep an asset, somebody else pays the mortgage on it, and you move up without selling into a market where you then have to buy. It is a genuinely good strategy for some people and a quiet disaster for others, and which one it is comes down to arithmetic you can do in advance.

What does the lender actually need?

What your lender will count is the whole ballgame on this plan, and it is where most of them break.

Either your income supports both payments, or the rental income has to count. If you qualify for both mortgages on your own income, this is simple and you can stop reading the financing part. Most people do not.

Your signed lease is probably not what the lender uses. This is the part that surprises nearly everyone. Fannie Mae’s Selling Guide, updated September 2, 2026, states that lease agreements “are not permitted for any departing residence.” So the lease you worked hard to get does not establish the income for conventional financing.

The lender uses a market rent estimate instead. That means an appraisal, a Form 1007, or a market analysis built from at least three comparable rentals. Then they take 75 percent of that figure and subtract the full monthly payment on the house you are leaving (Fannie Mae Selling Guide, September 2026).

Read that subtraction carefully, because it is the whole problem. Seventy-five percent of market rent minus the entire payment is frequently a negative number, and a negative number counts against you.

Reserves are usually required. Under the same guide, with less than twelve months of property management experience you need six months of reserves to cover the departing property. That catches people who planned to put every dollar into the down payment.

So the sequence is: talk to the lender first and find out what the market rent estimate produces for your specific house. Placing a tenant does not change that answer, and it may commit you to terms before you know whether the purchase works.

What you might assume	What Fannie Mae actually does
Your signed lease proves the income	Leases are not permitted for a departing residence
The rent counts	A market rent estimate counts, at 75 percent
The rent offsets the payment	The full departing payment is subtracted
Your savings are the down payment	Six months of reserves may be required

The three costs people leave out

The math usually looks better on a napkin than it does in a year.

Vacancy

The house will be empty sometimes. Between tenants, during a turnover, after an eviction. Rent does not arrive those months and the mortgage still does.

Maintenance and turnover

A rental wears faster than a home you live in, and turnover costs money every time, paint, carpet, cleaning, repairs. Budget it as a recurring expense rather than a surprise.

Management

Either you do it, which is real work at inconvenient hours, or you pay someone a share of the rent. People who assume they will self-manage frequently change their minds in the first year.

Add those three and the cash flow that looked comfortable often becomes thin. That does not make it a bad idea. It makes the honest number smaller than the obvious one.

The tax and insurance changes

Your property tax treatment and your insurance both change the moment the house stops being your residence, and both get missed.

Your insurance is wrong the moment a tenant moves in. A homeowner’s policy is not a landlord policy. Call your carrier before the tenant does, not after a claim.

The property tax treatment changes. Utah’s primary residential exemption applies to a primary residence, and a rental is not one. Counties have their own process and deadlines for declaring a change in use, and getting this wrong is an expensive way to learn it. How Utah property taxes work covers the calendar and the declaration requirement, and in Washington County the form is due within sixty days of a change in use.

The income is taxable and the treatment is specific to you. Depreciation, deductions and what happens when you eventually sell are all real considerations and all worth an accountant rather than a blog post.

When would I not do it?

Keeping the house is the wrong call in four situations, where selling is better.

You need the equity for the down payment

If the money is in the house, keeping the house means not having the money. Some people solve this with a line of credit, which has to be arranged before the house is listed or tenanted. Whether you can buy a house before you sell yours covers the four routes.

The new purchase is already a stretch

Carrying a rental on a thin margin is how a vacancy becomes a crisis.

You do not want to be a landlord

This is a real job with real obligations, and doing it reluctantly goes badly. What renters’ rights are in Utah is worth reading before you decide, because the obligations run in both directions.

The house is a poor rental

High-maintenance, expensive to carry, or in a segment where rents do not support the payment. A house being a good home does not make it a good rental.

The short-term rental question

Different animal, and the rules decide it before the economics do.

Short-term rental is regulated locally and the restrictions are real. Whether short-term rentals are allowed in St. George covers how specific this gets, and the answer varies by zone and sometimes by subdivision. Assuming you can nightly-rent a property because others nearby appear to is a costly assumption.

Whether to rent out a Herriman house instead of selling it is the north-valley version of the long-term question, and how to sell a short-term rental in St. George covers the exit, which is worth understanding before the entrance.

Run the number properly, once

Running the rental number properly takes ten minutes with a calculator, and almost nobody does it before deciding.

Start with the realistic monthly rent, taken from what comparable properties actually leased for rather than what they are asking. Then subtract, in order: the mortgage payment including taxes and insurance, any association dues, a monthly allowance for vacancy, a monthly allowance for maintenance and turnover, and management if you will not be doing it yourself.

What remains is your actual monthly result, and for a lot of houses it is near zero or negative.

That is not automatically a reason to sell. A property that breaks even while someone else pays down your principal is doing real work, and appreciation over a long hold may be the point. But you need to know which case you are in, because a break-even rental requires reserves and a tolerant temperament, and a cash-flow-negative one requires a reason.

What I actually see

People who kept a house they should have sold, because selling felt like giving up an asset.

The pattern is a house with a payment the rent barely covers, in a condition that needs work, carried for years out of reluctance rather than strategy. Every vacancy hurts, every repair is resented, and the owner eventually sells anyway, later, with more deferred maintenance than when they started.

The ones who do well decided deliberately. They ran the numbers with vacancy and management in them, they had reserves, and they understood they were buying a small business rather than a passive income stream.

What to do next

Call a lender first and ask three things: what market rent estimate they get for your house, what the resulting figure is after the 75 percent and the payment subtraction, and how many months of reserves they require.

Then price the rent honestly, subtract vacancy, maintenance and management, and see what is left. If the number still works, call your insurer and your county before the tenant moves in.

Note: the conventional-loan treatment above is from Fannie Mae’s Selling Guide as updated September 2, 2026, which is what your lender works from on a conforming loan. Other loan types and portfolio lenders treat a departing residence differently, and guides are revised. Confirm the current rule and the numbers for your specific house with your lender.

I am Kelsey Earl, a Realtor with Keller Williams South Valley, and I will tell you when your house is a better sale than a rental. Tell me what you are weighing and we will run both.