Start with an honest look at your credit file

Before you set foot on a forecourt, it pays to know what a lender will see. Check your credit reports from the main credit reference agencies — the statutory versions are free — and read them properly rather than skimming the score. Look for anything that is wrong: a default that belongs to someone else, an old address, a settled account still showing as open. Mistakes are more common than you might think, and getting them corrected can lift your profile within weeks.

While you are there, note the things lenders care about most: missed payments in the last twelve months, defaults, county court judgments, and how much of your available credit you are already using. A maxed-out credit card is a warning sign even if you pay it on time. Clearing balances and keeping your usage under about 30 per cent of your limit will help more than any clever application strategy.

It also helps to know your realistic budget before you fall for a car. Add up your income, essential outgoings and existing credit commitments, then decide what you can genuinely afford each month — and what you could still afford if your circumstances changed.

Hire purchase: straightforward ownership

Hire purchase (HP) is the simplest form of dealer finance. You pay a deposit, then fixed monthly instalments over an agreed term, usually one to five years. The finance is secured against the car, and once the final payment clears, the vehicle is yours. There is no mileage limit and no balloon payment waiting at the end.

For buyers with a bruised credit history, HP is often the most accessible route. Lenders assess you on affordability and your record, and while the interest rate will be higher than the advertised headline deals, it is usually a fixed rate, so your payments will not move.

• Best for: buyers who want to own the car outright and keep it long term.
• Watch out for: a larger deposit reducing your rate, and any add-ons such as payment protection or paint protection, which can be expensive and rarely good value.
• Remember: because it is regulated credit, you have certain rights, including the ability to settle early and, in some circumstances, to hand the car back once you have paid half the total amount payable.

Personal contract purchase: lower payments, more strings

PCP keeps monthly payments down by deferring a large chunk of the car's value to the end of the agreement. You pay a deposit, then instalments based on the difference between the car's price and its predicted future value, known as the balloon payment or guaranteed minimum future value. At the end you have three choices: pay the balloon and keep the car, hand it back, or part-exchange it against a new one.

PCP can be harder to secure with poor credit because lenders are taking a bigger risk on the future value of the vehicle, and the rates offered to higher-risk applicants can be steep. There are also conditions attached.

• Mileage limits: exceed the agreed annual mileage and you will pay an excess mileage charge per mile.
• Condition standards: the car must be returned in reasonable condition, with fair wear and tear accepted, or you will face recharges.
• End-of-term decisions: if you cannot pay the balloon, walking away is fine, but you will have nothing to show for the money you have spent.

If your credit is poor but improving, PCP may still work with a sizeable deposit and a shorter term. Just be honest with yourself about your annual mileage before you sign.

A personal loan: buy the car outright

With a personal loan, you borrow a lump sum and buy the car yourself. The car is not used as security, so there is nothing to repossess if you fall behind — though the loan is still a debt, and missed payments will damage your credit further. The big advantage is that you own the car from day one and can sell it whenever you like, and you can often negotiate a better price by effectively paying as a cash buyer.

The catch is that unsecured lenders tend to be pickier. Advertised rates are the best-case rates, and applicants with poor credit may be offered far higher APRs, or declined altogether. It is worth getting a few quotes, but avoid firing off a flurry of full applications, as each one leaves a mark on your file. Use eligibility checkers where available, which show likely outcomes without affecting your credit score.

Practical steps to improve your chances

A bigger deposit is the single most effective lever. It reduces the amount you are borrowing, which in turn reduces the lender's risk and can bring down your rate. A part-exchange can serve as that deposit.

• Choose a modest, reliable car rather than stretching to something aspirational. Lenders look more kindly on sensible borrowing.
• Consider a smaller, specialist lender that works with higher-risk customers — but read the terms carefully and compare the total cost, not just the monthly figure.
• Ask a trusted friend or family member about acting as a guarantor only if you are confident you can keep up the payments; it puts their money at risk too.
• Say no to pressure. You are entitled to take the paperwork away, and regulated agreements give you a short cooling-off period.
• Keep paying everything else on time. Every clean month makes the next application easier.

Poor credit is not a permanent label. With a realistic budget, a decent deposit and an agreement you actually understand, you can get onto the road without overpaying for the privilege.