Bundling: What the Relationship Discount Is Paying For | HL Hunt
Bundling: What the Relationship Discount Is Paying For
Every institution wants to be your primary relationship, and the pitch is convenience plus a discount. Both halves are real: a 0.25% relationship discount on a $280,000 mortgage is worth $553 a year. What is not quoted alongside it is what the discount compensates for, which is five products sharing one point of failure, including an institution’s right to apply your deposits against your debt. The trade is legitimate. The probability it is priced against is the one variable nobody mentions.
What you'll learn
The core thesis
Every institution wants to be your primary relationship. The pitch is convenience and a discount: hold more products here, pay slightly less, see everything in one place.
Both halves of that are real. The discount is real money, and the convenience is a genuine reduction in effort. What is not disclosed is what the institution is buying, which is a view of your whole financial position and a switching cost that rises with every product added.
Our position is that bundling is priced as a discount and functions as a concentration of risk, and that the household bears the concentration while the discount is the compensation offered for it. Whether that is a good trade depends entirely on the probability of the relationship failing, which is the one variable nobody quotes.
What the discount is worth
Take a relationship discount of 0.25% on a $280,000 thirty-year mortgage, moving the rate from 6.65% to 6.40%:
- Monthly payment: $1,797.50 falls to $1,751.42
- Monthly saving: $46.09
- Annual saving: $553
- Over thirty years: about $16,591
That is a substantial benefit and it should be taken seriously. Per our pricing analysis, $553 a year is more than most households save by any other single decision available to them, and the only condition is holding accounts somewhere they would have held them anyway.
So the question is not whether the discount is worth having. It is what it is compensating for.
What is concentrated
Five products at one institution means five things share a single point of failure, and the failure modes are not hypothetical.
| Event | What it affects |
|---|---|
| Account frozen for review | Everything, including the account the mortgage is paid from |
| Set-off applied | Deposits used against a loan at the same institution, often without notice |
| Relationship exited | All products, per our account closure analysis, usually on a short timeline |
| A dispute on one product | The relationship behind all of them |
| An outage | Per our outage analysis, access to everything simultaneously |
| Repricing after the promotional period | Several products at once, with switching costs now higher |
The second row is the one households are least aware of and that matters most. An institution holding both your deposit and your debt can in many circumstances apply one to the other. That is a legitimate and disclosed feature of the relationship, and it means money you hold at the same place as your borrowing is not the same thing as money held elsewhere, particularly at the moment you most need it to be.
Per our correlation analysis, this is the general pattern: protections are assessed as though each will be tested alone, and bundling makes the common cause explicit. A household with an account at one institution and a loan at another has two independent relationships. The same household bundled has one.
The switching cost is the product
Each product added makes leaving harder, and that is not a side effect.
- Direct debits and standing instructions have to be relocated, which per our notice analysis is where things get missed.
- The discount is lost on everything when one product moves, so the cost of switching one is priced across all.
- The relationship history does not travel. Per our portability analysis, years of observed cash flow are the most valuable thing the institution holds about you and the least portable.
- Reapplication means new assessments, per our inquiry analysis, each of which is recorded.
- Bundled pricing is hard to compare. Per our comparison analysis, a package price cannot be set against component prices without unbundling it yourself.
Point two is the mechanism that makes a bundle sticky rather than merely convenient. Moving one product costs the discount on all of them, so the effective price of switching a single account is the whole relationship benefit. That is a deliberate structure and a legitimate one, and it is why the discount should be read as a retention instrument rather than only as a saving.
Point five is why the discount often cannot be evaluated at all. If the bundled mortgage rate is 0.25% better but the bundled card is 3% worse on a balance you revolve, per our revolver analysis the package may cost more than its components while advertising a saving on the largest line.
What the institution gets
Worth stating plainly, because it explains why the discount exists and how large it can be.
- A view of your whole position. Per our cash flow analysis, an institution seeing your income and your spending underwrites you better than one seeing a credit file, which is a genuine efficiency it can share with you.
- Earlier warning. It sees a problem developing weeks before any bureau does, per our early outreach analysis.
- Lower acquisition cost per product. Selling a second product to an existing customer is far cheaper than acquiring a customer.
- Set-off rights, which reduce its loss given default.
- Retention. The switching cost above.
The first two items are the honest basis for the discount and they are real. A bundled customer genuinely is cheaper to serve and cheaper to underwrite, so some of the discount is a shared efficiency rather than a payment for accepting concentration. Both things are true at once, which is what makes this a trade rather than a trick.
A falsifiable claim
Bundled customers should default less than comparable unbundled customers, and most of the gap should be information rather than loyalty. That is separable: compare default rates between bundled and unbundled customers matched on credit characteristics, then check whether the bundled advantage survives controlling for what the institution could observe about cash flow. If it does not survive, the advantage is informational and the discount is a shared efficiency. If a gap remains after controlling for observable cash flow, something about the relationship itself is affecting behaviour, which would be a more interesting finding and a harder one to explain.
A workable rule for households
Not "never bundle," which forfeits real money, and not "bundle everything," which concentrates everything.
- Hold one account at a second institution, always. Per our account closure analysis, this single step converts a frozen relationship from a crisis into an inconvenience, and it costs nothing.
- Do not hold deposits at the institution holding your unsecured debt if you are at any risk of difficulty, because of set-off.
- Bundle the products where the discount is large and the switching cost is low. A mortgage rate discount is worth $553 a year and the mortgage was not moving anyway.
- Unbundle the products where the discount is small and the terms matter. A revolving card is where a bad rate costs most, per our card interest analysis.
- Price the package against the components once a year, which is the only way to know whether the discount survived the repricing.
- Keep the emergency buffer somewhere else entirely. Per our buffer analysis, a buffer that is inaccessible in the event it was saved for is not a buffer.
Item one is the whole recommendation if only one is taken. It costs nothing, it requires no change to any existing arrangement, and it removes the single worst outcome in this article, which is a household unable to pay anything because the one relationship holding everything is temporarily unavailable.
Scenarios and what we are watching
| Scenario | What we would expect |
|---|---|
| Data portability becomes routine | The informational basis for the discount weakens, because any institution can see what the primary one sees, and bundle discounts compress |
| Switching gets easier | Bundles compete on price rather than on friction, which is better for households and worse for the discount |
| Concentration events become more visible | Account freezes and relationship exits are the main way households learn this lesson, and they learn it individually |
| Bundles deepen | More products per relationship, a larger discount, and a larger single point of failure, with only the first two advertised |
The first row is the development that would resolve the tension in this article. If the discount exists partly because the primary institution can see things others cannot, then making that information portable removes the informational advantage and leaves the discount as what remains: a payment for accepting concentration and a retention instrument. At that point the trade becomes legible, which is the condition under which a household can actually evaluate it, and per our portability analysis that is the more general argument for portability than any individual benefit it confers.
Frequently asked questions
A 0.25% discount on a $280,000 mortgage is $46.09 a month, $553 a year, and about $16,591 over thirty years.
Everything behind one relationship: freezes, exits and outages hit all products at once, and set-off lets deposits be applied against debt at the same institution.
Moving one product forfeits the discount on all of them, so switching one account costs the whole relationship benefit. Package pricing also resists comparison.
Always hold one account at a second institution. Then bundle where the discount is large and switching costs low, and unbundle where the terms matter most.
Key takeaways
- A 0.25% relationship discount on a $280,000 mortgage is worth $553 a year and about $16,591 over the term.
- The discount is compensation for concentration: freezes, exits and outages affect every bundled product at once.
- Set-off means deposits held alongside your debt are not equivalent to deposits held elsewhere, exactly when that matters most.
- Moving one product forfeits the discount on all of them, so the switching cost of one account is the whole relationship benefit.
- Package pricing resists comparison, so a bundle can cost more than its components while advertising a saving on the largest line.
- Some of the discount is a genuine shared efficiency, because a bundled customer is cheaper to underwrite and to serve.
- Hold one account at a second institution always: it costs nothing and removes the worst outcome in this analysis.
- Keep the emergency buffer outside the primary relationship, because a buffer inaccessible in the event it was saved for is not a buffer.
This analysis is educational and does not constitute financial or legal advice. All figures are stylized illustrations using assumed loan amounts, rates, and discounts, and do not describe any particular institution or offer. Set-off rights, account freeze and closure practices, relationship pricing structures, deposit protection, and switching procedures vary by institution and by jurisdiction and are governed by the terms of individual agreements. Read your own account terms and take independent advice on any specific arrangement.