It depends on the severity and recency of your credit issue, but the realistic range for a bad credit mortgage deposit runs from around 5% at the low end to 25% or more at the high end.

There is no single number here, whatever a quick search might promise you. But there is a clear pattern once you understand what lenders are actually weighing up, and that pattern is worth understanding once you see it.

Why Does Deposit Matter So Much With Bad Credit?

Deposit is the single biggest lever you personally control when a lender is weighing up risk.

A larger deposit means more equity in the property from day one. That equity acts as a cushion for the lender. If repayments stop for any reason, the lender has a bigger margin between the loan balance and the property value. This directly offsets the extra risk that a credit issue represents in their assessment.

This relationship between deposit and loan size is called loan-to-value, or LTV. A 10% deposit means a 90% LTV. A 25% deposit means a 75% LTV. The lower the LTV, the less the lender has at stake.

LTV matters for every mortgage, not just adverse credit ones. But when a credit issue is also part of the picture, LTV carries more weight than usual. It is often the factor that tips a marginal application from a decline into an approval.

What Are the Three Deposit Tiers?

Deposit expectations broadly fall into three tiers, based on how severe and how recent the credit issue is.

• Tier 1: Minor, older issues. A single missed payment from several years ago. A small satisfied CCJ or default registered over three years ago. A paid-off payday loan from the past with no other negative marks. For these profiles, a deposit of 5% to 10% is often achievable with the right specialist lender.
• Tier 2: Moderate issues. A satisfied default within the last one to two years. Multiple missed payments spread across more than one account. An older, unsatisfied marker that has not yet been resolved. For these profiles, a deposit of 10% to 15% is the more typical range.
• Tier 3: Recent or severe issues. A recent unsatisfied CCJ or default. An active IVA. A recent bankruptcy discharge. For these profiles, a deposit of 15% to 25% or more is commonly required, and the lender panel at this level is narrower.

These tiers are not rigid cutoffs. They overlap, and individual lenders draw the lines slightly differently. But as a way to self-identify roughly where you sit, they are reliable enough to be useful.

How Does the Type of Credit Issue Affect Deposit Requirements?

Not all credit issues carry the same weight, even at a similar deposit level.

A CCJ is generally viewed more seriously than a default of similar age and amount, because a CCJ is a court order rather than a lender's own record. An IVA or bankruptcy typically sits at the more severe end regardless of how the rest of the profile looks.

The specific credit issue you have shapes which tier you sit in, and knowing that detail is where a broker adds the most value.

For deposit expectations specific to CCJs and defaults, see our mortgage with a CCJ or default page.

If you are self-employed on top of having credit issues, deposit expectations can shift further. That combination is covered on our self-employed bad credit mortgage page.

Can Deposit Size Make Up for a More Recent Credit Issue?

Yes, to a real extent. Deposit and time work as substitutes for each other.

A bigger deposit can sometimes open doors that would otherwise only open after a credit issue has aged further. This is one of the most useful practical levers available to you, because deposit size is something you can actively work on, unlike the passage of time.

If you are sitting at 10% deposit with a credit issue from 18 months ago, you might find limited options. Increase that deposit to 15% or 20% and the same application may be viable with a wider range of specialist lenders, even though the credit issue has not aged a single day.

This does not work infinitely. A very recent, severe issue will still be difficult to place regardless of deposit. But within a reasonable range, the trade-off is genuine and worth understanding.

Not sure which tier your own situation falls into? Our Criteria Hub breaks down exactly how the type, age, and severity of your credit issue affects your options. Check the Criteria Hub →

Where Can Your Deposit Come From?

Most lenders accept personal savings, a gifted deposit from family, or funds from the sale of another property.

Gifted deposits are generally accepted but may face more scrutiny when bad credit is also part of the application. Lenders want a clear paper trail showing where the money came from and that it is a genuine gift, not a loan that will need repaying. A signed gift letter from the donor is standard practice.

Consistent, regular saving demonstrated over several months is viewed favourably in its own right, separate from the deposit total. It signals financial discipline, which a lender weighs alongside the number itself.

Inheritance, redundancy payments, and compensation payouts can also form a deposit, provided they can be evidenced with a clear paper trail.

Are There Low-Deposit Options for Bad Credit Mortgages?

Sometimes, though options narrow considerably compared to someone with clean credit.

Some government-backed schemes can lower the deposit needed, but lender participation in those schemes varies significantly. Not every scheme lender will accept every type of credit issue, so eligibility needs to be checked case by case.

Truly low or no-deposit options are rare for anyone with bad credit. If you encounter a claim of no deposit required with bad credit, approach it with real caution. The terms attached are often less favourable overall, and the arrangement may not be what it appears.

A realistic view of your deposit position, rather than an optimistic one, puts you in a stronger position when you do apply.

What If You Are Remortgaging Instead of Buying?

Deposit works a little differently if you already own a home and are remortgaging rather than buying for the first time.

The equity you already hold in the property functions the same way a deposit does for a purchase. The more equity you hold relative to the property value, the lower your LTV, and the more lender options open up.

If your property has increased in value since you bought it, your effective LTV may be lower than you think, which can work in your favour even with a credit issue on your file.

For a full breakdown of how equity and deposit work when remortgaging with bad credit, see our remortgage with bad credit page.

How a Broker Helps You Get the Deposit Question Right

A broker can tell you quickly which tier you realistically sit in, rather than leaving you to guess from generic online ranges.

This matters because the difference between assuming you need 25% and discovering you really only need 10% can be the difference between waiting years and buying next year.

The generic range is useful as a starting point. A specific, individual assessment is what actually moves things forward.

A soft search first means this assessment does not damage your credit file, whatever it concludes. You get a clear answer without any downside.

As an FCA-regulated bad credit mortgage broker, we give you a clear, specific answer rather than a generic range.