Lenders do not average your scores. They take the worse one.
Will my bad credit affect my husband buying a house? Yes, if you are both on the mortgage — and not in the way most people expect.
Lenders do not average two credit scores. They do not weight them by income. On a joint application they take the lower of the two qualifying scores and price the loan on it. A 780 and a 620 gets you 620 pricing.
That sounds brutal and it produces a real choice, because you are not obliged to apply together. There are two legitimate routes and they trade off against each other in a way that is worth working through properly rather than assuming.
How the qualifying score is actually chosen
The mechanics matter because they determine what to do next.
Each of you has three credit scores, one from each bureau. For a mortgage, the lender takes the middle score for each person — not the highest or the average, the middle. Then, with two applicants, it uses the lower of those two middle scores.
That single number sets your rate tier. Mortgage pricing moves in bands, so being just below a threshold costs the same as being well below it — which is why a small improvement can be worth a great deal if it crosses a boundary, and almost nothing if it does not.
Income works in the opposite direction. Both incomes count when both of you are on the loan. So adding the lower-scoring partner increases what you can borrow and worsens the rate you borrow at.
Option one: apply alone, on one income
Your husband applies by himself. His score sets the rate, and only his income counts.
This is the right answer when the score gap is large and his income alone supports the purchase. You get the better rate for the entire life of the loan, which on a thirty-year mortgage is a substantial sum.
The obvious cost is borrowing capacity. One income supports a smaller loan, and in an expensive market that can be the difference between buying and not.
The less obvious cost is that debts count too. Applying alone means only his debts are counted against his income — which occasionally makes a single application stronger than a joint one, if the lower-scoring partner also carries most of the debt.
You can still own the house
The most important thing people do not know: whoever is on the mortgage does not have to match who is on the title.
One person can hold the loan while both of you own the property. That gives you the better rate and full joint ownership. There are some state-specific and lender-specific wrinkles, and it is worth confirming with both the lender and a real estate attorney — but as a general structure it is common and it solves most of the problem.
What counts as bad credit for a mortgage
Worth being concrete, because "bad credit" covers a range in which the practical outcomes are completely different.
At the top end of the problem range, you will be approved and simply pay more — a somewhat worse rate and possibly higher mortgage insurance. Inconvenient, not disqualifying.
Lower down, your options narrow to specific loan programmes with their own requirements, and the pricing gets meaningfully worse. Lower still and most conventional lending closes off, leaving government-backed programmes with lower score floors but their own costs attached.
The practical point is that the bands matter more than the number. Moving from just below a threshold to just above it can change your pricing substantially, while a twenty-point improvement that stays inside the same band changes almost nothing.
Ask a lender where the thresholds sit for the programme you are considering, then work out how far you are from the next one up. That converts a vague repair project into a specific target, which is the difference between a plan and an intention.
Why your score matters even if you are not on the loan
Two ways it still reaches you. If you live in a community property state, some lenders will consider a non-applicant spouse's debts even when they are not on the loan. And after closing, the household still has to carry the payment — a weak score usually reflects a debt load that is real regardless of whose name is on the mortgage.
Option two: apply together and pay for it in the rate
Both incomes, both debts, the lower score.
This is right when you need the second income to qualify, or when the score gap is small enough that the rate difference is minor.
Do the arithmetic rather than guessing. Ask a lender to quote both scenarios — one applicant and two — and compare the monthly payment and the total interest. Lenders will run this; it costs you nothing and takes them minutes.
Frequently the result is surprising in one direction or the other, which is precisely why it is worth asking rather than assuming.
What the difference actually costs
Rate bands vary by lender and market, but the shape is consistent: the gap between excellent credit and fair credit is typically well over a percentage point, and often considerably more at the lower end.
On a thirty-year mortgage, a difference of one percentage point changes the monthly payment meaningfully and the total interest paid enormously — the kind of number that makes six months of deliberate repair one of the highest-return activities available to a household.
There is a second cost people forget: mortgage insurance and some fees are also priced by credit tier on many loan types. So the score affects more than the headline rate.
The timing that makes the difference
Credit repair before a mortgage is as much about calendar as about action.
Twelve months out: pull all three reports for both of you and dispute anything wrong. Disputes are slow, and this is the only point where slowness does not cost you.
Six months out: start the utilisation work and add the authorised-user account so it has time to report. Stop opening anything new from here.
Three months out: no new accounts, no closed accounts, no large purchases on credit. Get pre-approved so you know the real number rather than an estimate.
Under sixty days: change nothing at all. Lenders re-pull credit shortly before closing, and a new account or a spike in balances at that point can genuinely alter your terms or sink the approval.
That last one catches people constantly — furniture for the new house, bought on credit between approval and closing, is the classic version.
The six-month repair plan that changes the tier
If a purchase is a year or two away, this is where the money is. The levers, in order of speed.
Utilisation. The fastest by a distance. Getting balances below thirty percent of limits — ideally below ten — can move a score within one or two billing cycles. Requesting a credit limit increase achieves the same ratio without paying anything down.
Pay before the statement date. Issuers report the statement balance, so a card paid in full after the statement still reports high utilisation. Paying a few days earlier can move a score noticeably for no cost at all.
Authorised user. Adding the lower-scoring partner to the stronger partner's oldest, lowest-utilisation card usually reports that history to their file. One of the fastest interventions available and it carries no liability.
Errors. Pull all three reports and read them properly. Errors are common, and disputes take weeks — which is why this belongs at six months out, not six days.
Collections. Ask about a pay-for-delete, and get any agreement in writing before paying.
Time and consistency. Automate every minimum payment so a missed one becomes structurally impossible.
What to avoid in that window: opening new accounts, closing old ones, and any large new balance. All three cost points at exactly the wrong moment, and the timing rules matter as much as the actions.
If you are the one with the bad credit
Worth saying directly, because this question is usually typed by the person who feels they are the problem.
You are not disqualifying your partner from buying a house. There is a structure that works in almost every version of this — they take the loan, you take the title, and you buy the house. The rate is better and you own it together.
What you should insist on, rather than apologise your way out of, is being on the title. It is common for the lower-credit partner to feel they have forfeited a claim, and that instinct produces genuinely bad outcomes years later. Contributing to a mortgage you do not legally own any part of is the worst version of this arrangement and it is entirely avoidable.
And a low score is a fact about a credit file, not about you. Most of them are the residue of being young, being ill, or a period when the money genuinely was not there. Treating it as a moral matter is how people end up hiding financial information from each other, which is a considerably more expensive problem than a rate tier.
What to ask for
Name on the title. A shared understanding of what happens to the equity if things change. And a repair plan with a date on it, so that this is a temporary structure rather than a permanent asymmetry — most scores in the fair range can be moved within a year of deliberate work.
Working out what you can actually afford
Separate from what you will be approved for, and the gap between the two is where households get into trouble.
A lender will approve you against a debt-to-income ratio that assumes your current income continues and your current expenses are your real expenses. It does not know about the child you are planning, the car that needs replacing, or the fact that one of you wants to change careers.
Work out your own number first. Take your combined take-home, subtract what you actually spend on everything other than housing, subtract what you want to keep saving, and what remains is your genuine housing budget. Then compare that to the approval figure and use the lower one.
Do that before you look at listings, for the same reason you set a wedding budget before touring venues — every number chosen after you have seen something you want is negotiated warm. The same discipline that stops a venue setting your wedding budget applies exactly to a house.
Who should be on the title regardless
Worth deciding deliberately rather than defaulting to whatever the lender's paperwork does.
If one of you is on the mortgage alone, being on the title is what makes the other person an owner. Without it, they have no ownership interest in a property they are paying for and living in, which is a genuinely bad position to be in — and one that most often falls on the partner with the weaker credit, who is already the one with less financial power in the transaction.
Say it plainly to each other: the loan is a financing decision, the title is an ownership decision, and they do not have to match. Deciding them separately is how you get the better rate without one person quietly ending up with nothing.
And treat the score conversation carefully. A low score is usually the residue of being young, unlucky or unwell, not a character assessment — and treating it as one makes the person less likely to tell you things, which is the thing genuinely worth protecting.