EyeOnStart by knowing exactly what the file says
Before anything else, read the full credit file from each bureau that operates in your country. Applications are decided on the file's contents, so the preparation is: check every entry, correct errors through the dispute process, and understand how old each negative item is.
The age of events matters because scoring and lending policies both weigh recency heavily. A default from five years ago with a clean record since presents very differently from one last year, even though both are visible.
Let time and behaviour do some of the work
Where the timing is flexible, the cheapest improvement is often simply waiting while making every current payment on time and keeping utilisation low. Negative entries fade in influence and eventually drop off; meanwhile a growing stretch of clean history changes how the file reads.
If a deposit can grow during the same period, the effect compounds: a larger deposit means a smaller loan, better loan-to-value pricing, and a wider range of lenders willing to consider the application.
Understand the specialist market honestly
Lenders that specialise in impaired credit exist in most markets. They compensate for added risk with higher rates, larger deposit requirements and sometimes shorter initial deals intended to be remortgaged once the record improves. That structure can be a legitimate bridge — and the higher-rate cost calculator shows what the bridge costs per month and over the term.
The plan only works if the improvement is real: the record must genuinely get better, and the exit into a mainstream deal must be possible. Borrowers sometimes find a broker who knows this market useful, since eligibility rules between specialist lenders vary more than between mainstream ones.
Protect the file while you apply
Use soft-search or eligibility-checking tools where they are offered, so comparing lenders does not itself damage the file. When formal applications do go in, cluster them sensibly rather than spreading them across months, and be accurate on every form — discrepancies are treated more harshly than many applicants expect.
Finally, size the borrowing to survive reality, not just the approval. A mortgage that a budget can only just carry is fragile in exactly the circumstances that damaged the credit history in the first place. The affordability calculator frames that test.