Be ready for things to go wrong.

No one loves shelling out money for unexpected expenses, but sometimes that seems like a rite of passage in homeownership. “Most of the time, the unhappy surprises are simply due to people being unaware of the things that can crop up,” says Brad Hunter, chief economist for HomeAdvisor. First-time homebuyers in particular may not know what to expect after closing on a home, and there’s nothing worse than developing buyer’s remorse about one of the largest investments you’ll ever make. Here are eight headaches to prepare for if you’re looking to purchase a house.

A suddenly less-than-desirable location

Buying a house across the street from a high school didn’t seem like such a bad idea when you saw how nicely renovated it was. But when you don’t have kids and Friday night football games are keeping you up later than you would like, you realize you should have made a pros-and-cons list regarding the location. Don’t let a charming interior override a location you dislike or a lot that will give you flooding problems. “If you don’t like your lot, don’t buy the house, because you cannot change that,” says Kim Wirtz, a Realtor for Century 21 Affiliated in Lockport, Illinois.

A high monthly mortgage payment

One of the most crippling headaches to deal with is a monthly mortgage payment you find you can’t quite afford. Lysette Portales, a real estate agent with Century 21 Jim White & Associates in Treasure Island, Florida, says she stresses to clients that they should shop around for a mortgage with multiple lenders and inquire with each about different program options. “A lot of them might be able to do 100 percent [financing],” she says, noting that many homebuyers typically only know about a couple mortgage programs and settle for one without considering what would be most affordable option both now and down the line.

Items that are on their last legs

Whether it’s the roof, water heater or furnace, aging home systems will need replacement. And that may end up being sooner than you’d like, especially if you didn’t pay close attention to the age and condition of the roof, plumbing, electric and heating and cooling systems when your inspector pointed them out. HomeAdvisor’s 2015 New Homeowner Survey found that 75 percent of homeowners face an unexpected emergency within a year of purchase. To expect the unexpected, Hunter points to the survey’s recommendation that homeowners plan to spend 1 percent of the home’s purchase price on unplanned repairs. Maintaining at least that much in your emergency fund will help keep you from dipping into other savings from year to year.

Old systems

It’s important to pay attention to a home’s aging big-ticket items before you even make an offer. “A lot of homebuyers are distracted by how cute a home can be,” Portales says, adding that she makes it her job to point out the age of the roof, air conditioning unit, water heater and more to buyers. Then when it comes time to calculate an offer, you should factor in the cost of those pieces that will need immediate replacement when determining how much you think the home is worth.

An air conditioner that’s not the same

Wirtz says one of the things in a home that seems to always break or have issues within the first year of its purchase is the air conditioner. But it’s not always because it breaks down — she says it simply might not be as effective as the new homeowner wants it to be. “It may not be cooling like they’re used to,” Wirtz says. You can either learn to deal with a little less cooling, bring in an HVAC pro to inspect and fix any problems or research any DIY fixes that might get it cooling better — like air conditioner cleaning spray.

Unseen leaks

Home inspectors aren’t able to see through walls, so the discovery of a pipe leak isn’t uncommon after you’ve moved into the home. But this is one repair you want to make as quickly as possible. “When there’s water that is not stopped, it can create mold — and mold remediation is extremely expensive and extremely difficult,” Hunter says. Mold growth in your home can cause serious health problems, so it’s imperative to address any moisture issues as quickly as possible to avoid it becoming any more dangerous, let alone more expensive.

Surprise renovation expenses

Fixer-uppers are all the rage these days, as many homebuyers are willing to take on renovation projects in exchange for a slightly lower price tag. But when budgeting for your renovations, leave plenty of room for the discovery of existing problems once your contractor looks behind the walls. The HomeAdvisor survey found 51 percent of homeowners spent more time on home projects than they expected. “Even if you have a fully vetted, well-reviewed contractor … they still might uncover issues that maybe a previous contractor left incomplete,” Hunter says. He recommends leaving around 10 percent extra space in your budget for surprise problems of any kind.

Problems that pile up

All too often it feels like the problems in a home have a snowballing effect, but you don’t have to go broke tackling them all at once. “Day one, [homeowners] won’t have to tackle all those projects,” Hunter says. “They can use the list of items found by the home inspector as a checklist and prioritize the items on that list and create a budget.” You should immediately address those problems that create a health or safety issue, such as a broken step or leak in your roof that could lead to mold. But replacing an older dishwasher can wait until next year, when you have more room in your home repair budget.

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8 Potential Headaches to Be Aware of Before Becoming a Homeowner originally appeared on usnews.com