A guarantor loan leaves a mark on both the borrower's and guarantor's credit files, but the timing and size of that mark depends on which stage of the loan you are at.
This article is information only. It does not constitute financial advice and cannot tell you whether a guarantor loan is right for your circumstances. For personalised guidance, consider speaking with a free, regulated service such as MoneyHelper.
What is the short answer?
For the borrower, a guarantor loan works like most other personal loans: a hard search is recorded when the loan is accepted, the account appears on the credit file, and monthly payment history is reported. For the guarantor, the picture is less straightforward. Being attached to the loan does not immediately hurt the guarantor's credit score. The guarantor's file is typically only affected at two points: when a hard search is run at acceptance, and if the lender calls on them to make a payment because the borrower has not.
What happens at the application stage?
When a borrower first applies for a guarantor loan, the lender usually runs a soft search on both the borrower and the guarantor.
A soft search is a preliminary check. It lets the lender see a summary of the credit file to assess whether the application is likely to be accepted. The important bit is that soft searches are not visible to other lenders and do not affect either person's credit score.
This means that at the point of first enquiry, simply exploring your options leaves no lasting mark.
What happens when the loan is accepted?
Once the lender is satisfied and both parties sign the credit agreement, most lenders carry out a hard search on both the borrower and the guarantor.
A hard search is a full look at the credit file. It is recorded and visible to other lenders for around 12 months. Having one hard search on its own causes only a small, temporary dip in the score. Several hard searches in a short period can look more significant to future lenders.
Experian's published guidance "What is a hard credit check?" explains that a hard search is recorded whenever a lender makes a full credit application check. It is worth confirming directly with your lender whether this applies to the guarantor named in the agreement, as policies can vary.
At this stage, the loan account is also opened on the borrower's credit file. The lender reports the balance owed, the agreed term, and the monthly repayment amount to one or more of the three main credit reference agencies in the UK: Experian, Equifax, and TransUnion.
How does monthly repayment history affect the credit file?
From the first payment onwards, the lender typically reports to the credit reference agencies every month. This is where the borrower's credit file can be most noticeably shaped.
On-time payments are recorded as a positive entry. Over time, a clean repayment record builds evidence that the borrower manages credit responsibly. This matters because payment history is one of the most significant factors in how the UK credit reference agencies compile their data.
Missed or late payments are also recorded. A single missed payment can stay on a credit file for six years from the date it was recorded. This retention period is set out in the Information Commissioner's Office guidance on credit reference data: "Credit explained", which confirms that most adverse entries, including missed payments and defaults, are held for six years. Several missed payments, or a formal default, can make it harder to borrow at competitive rates in the future.
The guarantor's credit file is not routinely updated each month simply because they are attached to the loan. Their score is not dragged down by being a guarantor in itself.
What is the counter-intuitive bit for guarantors?
Many people assume that agreeing to be a guarantor immediately damages their credit score or ties it to the borrower's history for the duration of the loan. This is a common concern, but it is not quite how it works.
The guarantor's credit file is normally affected only in two situations:
- The hard search at acceptance, a single search, visible to lenders for around 12 months, with a modest and temporary effect on the score.
- If the lender calls on the guarantor to pay, if the borrower misses payments and the lender formally requests payment from the guarantor, that event is recorded on the guarantor's file.
The second point matters. If the lender contacts the guarantor and the guarantor then makes the payment on behalf of the borrower, that payment activity is likely to appear on the guarantor's credit file. If the guarantor also fails to pay, a missed payment or default could be recorded against them too.
A simple way to think about it: the guarantor's score is not affected just by watching the loan from the sidelines. It is affected by being called to act, and by what happens when they are.
Does a guarantor loan create a financial association?
It can, and this is worth knowing about before agreeing to be a guarantor.
When two people share a credit account, the credit reference agencies may record a financial association between them. This links the two credit files. When the borrower later applies for a mortgage, car finance, or another loan, a lender may look at the guarantor's credit history as part of that assessment, and vice versa. TransUnion's published guidance, "Financial associations", explains that a financial association is created when two individuals are linked on a credit account and that it can influence how a lender views either party's application.
The association stays on file until both parties ask the credit reference agencies to remove it, which is typically only possible once the loan is fully repaid and there is no live financial link between them. Once the loan is repaid, a guarantor can request removal of the financial association by submitting a notice of disassociation directly to each agency: Experian's process is described at "Notice of disassociation", Equifax's process can be found on the Equifax consumer support pages, and TransUnion's through the TransUnion consumer portal.
Checking your credit file with Experian, Equifax, or TransUnion will show any financial associations that have been recorded. If you believe an association is incorrect or out of date, each agency has a process for raising a dispute.
What happens if the borrower defaults?
If the borrower stops paying entirely and the lender registers a formal default, that default is recorded on the borrower's credit file and stays there for six years from the date it was recorded, as confirmed in the ICO's "Credit explained" guidance.
For the guarantor, the position depends on the lender's policies and the wording of the credit agreement. In many cases, the lender will formally demand payment from the guarantor once the borrower defaults. If the guarantor makes those payments, the activity appears on their file. If the guarantor also fails to pay, a default could be registered against them as well.
This is the highest-stakes outcome for the guarantor, which is why reading the credit agreement carefully before signing is a reasonable step. If you are already in difficulty with payments, MoneyHelper and StepChange both offer free, confidential support.
What to check before taking out or agreeing to a guarantor loan
Whether you are the borrower or the guarantor, a few checks are worth making before the agreement is signed:
- Check your credit file first. All three main agencies offer access to your statutory credit report free of charge: you can request yours from Experian, Equifax, or TransUnion. Knowing what is there before a hard search is run gives you a clearer picture.
- Ask the lender whether they will run a hard search on the guarantor at application or only at acceptance. Policies vary.
- Read the agreement wording on default and guarantor liability. Understanding exactly when the lender can turn to the guarantor helps both parties make an informed decision. For example, some agreements allow the lender to contact the guarantor after a single missed payment, while others require a formal default first, the distinction can matter significantly for the guarantor's credit file.
- Consider whether the financial association suits both parties. If the guarantor is planning to apply for a mortgage or other major credit in the near future, a new financial association on their file is something to think through.
Frequently asked questions
Does being asked to be a guarantor affect my credit score?
Simply being named as a guarantor at the application stage does not usually affect your credit score. Most lenders run only a soft search on the guarantor at that point. A hard search is typically recorded only when the loan is formally accepted and you both sign the agreement.
Will the guarantor loan appear on my credit file as a borrower?
Yes. Once the loan is accepted and funds are released, the account is usually added to your credit file. The lender then reports your monthly payment history to the credit reference agencies, so on-time payments are recorded alongside missed ones.
What happens to the guarantor's credit score if the borrower misses a payment?
A missed payment by the borrower does not automatically appear on the guarantor's file. The guarantor's file is normally only affected if the lender formally calls on them to make a payment and they either pay or fail to. Policies vary by lender, so checking the agreement wording is worthwhile.
Can paying off a guarantor loan help the borrower's credit score?
Consistently making on-time repayments over the life of the loan can add positive payment history to the borrower's credit file. No specific score increase is guaranteed, but a solid repayment record is one of the factors credit reference agencies consider.
How long does a guarantor loan stay on a credit file?
In the UK, most credit accounts remain on your file for six years from the date they are settled or defaulted, as set out in the ICO's "Credit explained" guidance. The account shows as open while it is active and then as closed once repaid. A default marker also stays for six years from the date it was recorded.
Does a guarantor loan create a financial association between borrower and guarantor?
It can. If both names appear on the same credit account, the credit reference agencies may create a financial association between the two people. This can mean a lender looks at the guarantor's credit file when the borrower applies for other credit, and vice versa.
Related reading
For a fuller picture of how guarantor loans work, the Guarantor loans guide covers eligibility, costs, and what to expect through the application process.
To understand more about what is on your credit file and how it is compiled, the Credit reports and scores guide is a useful starting point.
MoneyHelper offers free, impartial guidance on borrowing, credit files, and debt, and is a useful first stop for anyone wanting to understand their options without cost.
Sources
- Experian: "What is a hard credit check?"
- Experian: "Notice of disassociation"
- Equifax: Equifax consumer support pages
- TransUnion: "Financial associations"
- TransUnion: TransUnion consumer portal
- Information Commissioner's Office: "Credit explained"
- MoneyHelper: moneyhelper.org.uk
- Does being asked to be a guarantor affect my credit score?
Simply being named as a guarantor at the application stage does not usually affect your credit score. Most lenders run only a soft search on the guarantor at that point. A hard search is typically recorded only when the loan is formally accepted and you both sign the agreement.
- Will the guarantor loan appear on my credit file as a borrower?
Yes. Once the loan is accepted and funds are released, the account is usually added to your credit file. The lender then reports your monthly payment history to the credit reference agencies, so on-time payments are recorded alongside missed ones.
- What happens to the guarantor's credit score if the borrower misses a payment?
A missed payment by the borrower does not automatically appear on the guarantor's file. The guarantor's file is normally only affected if the lender formally calls on them to make a payment and they either pay or fail to. Policies vary by lender, so checking the agreement wording is worthwhile.
- Can paying off a guarantor loan help the borrower's credit score?
Consistently making on-time repayments over the life of the loan can add positive payment history to the borrower's credit file. There is no promise of a specific score increase, but a solid repayment record is one of the factors credit reference agencies consider.
- How long does a guarantor loan stay on a credit file?
In the UK, most credit accounts remain on your file for six years from the date they are settled or defaulted. The account shows as open while it is active and then as closed once repaid. A default marker also stays for six years from the date it was recorded.
- Does a guarantor loan create a financial association between borrower and guarantor?
It can. If both names appear on the same credit account, the credit reference agencies may create a financial association between the two people. This can mean a lender looks at the guarantor's credit file when the borrower applies for other credit, and vice versa.