Why a bank says no

Affordability

The commonest reason. The instalment does not fit inside what is left after your existing commitments, or it does not survive the bank's stress test. The answer is arithmetic: clear a short-term debt, reduce a credit card limit you do not use, or borrow less. How that is worked out.

The credit record

A judgment, a default, or a run of missed payments. This is the one that takes time, and the only honest advice is to fix what is on the record and let it age. Anyone promising finance regardless of what is on your record is selling you something else.

Worth separating from it: a cluster of recent credit enquiries, which is not a default but does read badly. That one is avoidable. Why.

Presentation

The one nobody tells you about, and the one most worth fixing. Three months of statements where the bank wanted twelve. A commission income with no explanation of why one month is different. A deposit from a family member with nothing saying what it was. Business and household money in one account.

None of those make you a bad credit risk. All of them make you an unreadable one, and an unreadable application is a declined application.

Policy

Sometimes it is simply not that bank's business. Property type, the age of a vehicle, how long a company has traded, a sector they have pulled back from. Nothing about you changed and nothing about you needs to — a different lender writes it.