If you fail to plan, you plan to fail. (Getty Images)This article was sponsored by Navy Federal Credit Union. Navy Federal Credit Union is federally insured by NCUA.Military life has a way of teaching you that the best outcomes usually start with a plan, and buying a car is no exception.But buying a car isn't just about what looks good in the driveway and feels good in the driver's seat. It is about what works through PCSing, long commutes to base, deployments, and everything in between. You might be replacing a vehicle after a cross-country move, upgrading for a growing family, or finally getting that truck you've been saving up for after deployment.Whatever the reason, stepping onto the car lot without a plan can turn a smart purchase into an expensive mistake faster than you can drive it off.Before you test drive anything, take a minute to hit the brakes and set yourself up for a decision that works not just for now, but for wherever Uncle Sam takes you next. Here are five things to know before you go:1. Check your credit report before you start the buying process.Your credit report plays a key role in your auto loan. It directly influences your interest rate, monthly payment, and the total cost of your loan. The good news is that checking your credit report is simple—and often free.In the U.S., your credit information is tracked by three major credit bureaus (Experian®, TransUnion®, and Equifax®). Each one may have slightly different information about you, which is why it is important to check all three.Currently, every American is entitled to one free credit report per week from each of the three bureaus through AnnualCreditReport.com, which is the only federally authorized website for free credit reports.Each credit report consists of your credit history, accounts, and any negative marks. Make sure to look for incorrect account balances, accounts you don't recognize, late payments that were actually on time, or outdated negative items.Make sure to check for mistakes or anything that might be throwing your score off. Consider waiting for those mistakes to be removed so that you can be in a better position when you apply for your loan. Checking your credit isn't just a "nice thing to do," it's one of the easiest ways to improve your financial position, and avoid any surprises at the dealership. 2. Set a realistic budget that factors in the real cost of the vehicle.Take a good look at your budget to make sure you pick the right vehicle that works for you and your finances. Remember: The monthly payment is where dealerships tend to focus, but it's not the whole story. You are also looking at insurance, fuel or charging costs, as well as routine maintenance and repairs. AdvertisementAdvertisementA good rule of thumb is to budget off your base pay. Never base a payment on an amount including special duty pay, bonuses, or temporary allowances. Those extras can come and go depending on your assignments. Keep in mind that your income can shift with location-based expenses, family needs, and transition periods.A smart budget isn't about stretching to make the numbers work, but it is about choosing a vehicle that fits your life and your finances. 3. Research, research, research.Make sure you walk into the dealership well-prepared with reliable information. Don't rely solely on the sales conversation to guide your decisions. Skipping research is like shopping for groceries while hungry—it can lead to making decisions that don't fully align with your goals.Before you go, take time to compare makes and models, look up reliability ratings and reviews, check current pricing trends, and decide what features actually matter to you.Look at the difference between MSRP (manufacturer's suggested retail price), market prices in your area, and typical dealer markups. Some dealerships have a strict "no-haggle, MSRP-only" policy, meaning they will not sell below the sticker price. You may consider shopping around to get a better deal.The more you know going in, the less likely you are to be swayed by a shiny feature you didn't even think you wanted five minutes ago. 4. Secure your own financing before you go into the dealership.Walking into a dealership with your own financing ahead of time is a boss move. Not only can you compare ahead of time, but you won't be swayed by the fancy negotiation talk.Before you go, compare rates from your bank or credit union, look into military-friendly lenders, and consider applying for a preapproval.For example, Navy Federal Credit Union offers auto loans1 designed with the military members and their families in mind. They have competitive rates, flexible terms, and preapproval options on new and used cars that can help you shop with confidence before ever stepping onto the lot.Preapproval gives you a clear budget, an estimated interest rate, and more confidence in negotiations. It also helps you avoid making financial decisions in the moment, especially when you're already picturing yourself driving off the lot in your pretty new vehicle. 5. Know the trade-in value of your current vehicleNegotiation starts before you arrive at a dealership. If you're trading your current car, do your homework first. Even if it has been through multiple PCSes, long commutes, or a few "We can fix that later" moments, a car likely still has value.Make sure you get the most out of it. AdvertisementAdvertisementBefore heading in, check online valuation tools, look at similar listings in your area, and get a realistic estimate of what your car is worth. Dealerships often bundle trade-in value with financing and pricing, which can make things confusing pretty quickly, and you may not be seeing the full potential of what you can get for it. If you decide to sell your car to a dealership that features no-haggle pricing, then shop around to see which dealership will give you the most for your trade. In many of these situations, you don't have to buy your car there to sell your car there. Just be aware that once they give you a price, it may only be good for a limited time.Knowing your trade-in's value ahead of time can help you stay grounded during negotiations, keep each part of the deal separate, and avoid underselling your vehicle. Make sure you make informed decisions and not reactive ones. Prepare for the Long GameBuying a car isn't just a short-term decision, but it's a long game. You want to make sure you are picking a vehicle that will work for you across duty stations, life changes, and unexpected curveballs life tends to throw. AdvertisementAdvertisementThe right car should feel like a steady part of your life, not something that adds undue stress whenever your situation shifts. So yes, enjoy the test drive. Picture the road trips. Appreciate the new car smell. But take the time to plan before you get there. Because the best car purchase isn't the one that feels exciting in the moment, but it is the one that still feels right miles down the road.Don't Miss the Best of We Are The Mighty• Your military life through the eyes of your military mom• The Artemis II mission mirrors the military life we already live• 7 Ways modern military life is better for milspouses than it used to be 1 Credit and collateral subject to approval.This content is intended to provide general information and should not be considered legal, tax, or financial advice. It is always a good idea to consult a tax or financial advisor for specific information on how certain laws apply to your situation and about your individual financial situation. 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