What it means
Commercial property loans are sometimes sliced in two. The senior slice, the A-note, holds the first claim on the property and its income, while the B-note sits behind it and earns a higher rate for standing second in line.
The split lets lenders engineer risk. A bank can keep the conservative A-note that fits its credit rules and sell the B-note to an investor hungry for yield.
The borrower sees one loan, but behind it two creditors hold different tickets. The structure matters most when things go wrong.
The rights of the two holders are set out in an intercreditor agreement (a contract between lenders), which decides who controls workout decisions, who can buy out whom and the order in which recoveries are paid. Pricing follows waterfall logic (cash paid out in a strict order).
The A-note carries a lower rate because losses reach it last, and the B-note's extra yield is the price of standing in front of the blow. For non-finance managers, the concept explains why one mortgage can behave like two investments.
When a major tenant leaves, the senior holder may be happy to extend the loan and wait, while the junior holder, whose position may be underwater, may push for action. The same senior-and-junior logic appears across finance, from securitisation tranches to mezzanine debt (borrowing that ranks between senior debt and equity).
After 2008, disputes between senior and junior holders slowed some workouts, which is why the intercreditor agreement is now read as carefully as the loan itself.
In practice
Real-world examples.
Example
A bank keeps the senior A-note on an office loan to meet its credit rules and sells the higher-yielding B-note to a yield-seeking investor. The borrower notices no change.
Example
An anchor tenant leaves a shopping centre, and the two holders disagree. The senior holder prefers to extend the loan while the property is re-let, but the junior holder pushes for a quick sale.
Example
A struggling hotel loan is restructured into a sustainable senior piece and a junior piece that carries the rest of the debt. The split lets the lender show a performing senior loan while recognising the weaker junior portion.
Formula
Calculation
Cash and losses move through a waterfall: property cash flow pays the A-note in full before the B-note receives anything, and losses reverse the order, hitting the B-note first.
Worked example (illustrative figures): a $10,000,000 loan is split into a $7,000,000 A-note at 5.5% and a $3,000,000 B-note at 9%.
A-note interest: $7,000,000 x 5.5% = $385,000 per year.
B-note interest: $3,000,000 x 9% = $270,000 per year.
Total interest: $385,000 + $270,000 = $655,000, so the blended rate is $655,000 / $10,000,000 = 6.55%.
Cash flow test: if the property earns $770,000 a year, the A-note is covered $770,000 / $385,000 = 2.0 times.
If the property earns only $600,000, the A-note takes $385,000 first, leaving $600,000 - $385,000 = $215,000 for the B-note, which is $270,000 - $215,000 = $55,000 short.
Loss test: if the property is sold for $8,000,000, the A-note receives its full $7,000,000 and the B-note receives $8,000,000 - $7,000,000 = $1,000,000, a loss of $3,000,000 - $1,000,000 = $2,000,000.Case study
Seen in the real world.
This case study is fictional and illustrative. Larkspur Pension Fund is an invented investor that buys the $7,000,000 A-note of a downtown office loan, attracted by a conservative loan-to-value ratio and first claim on a building full of tenants. The $3,000,000 B-note goes to an opportunity fund that prices the risk of standing second, and for three years both sides receive their payments and barely think about each other.
Then the anchor tenant leaves, and the building's income covers only the senior payment. The intercreditor agreement gives the senior holder control of the workout, so Larkspur extends the loan and waits for new tenants, while the B-note holder, watching its position go underwater, argues for a quick sale. Two years later the building is re-let and both notes recover, but Larkspur's investment committee changes its diligence for good, and it now reads the intercreditor agreement before the appraisal. The committee secretary records the lesson: in a split loan you do not buy the property, you buy a position in a queue.
Watch out
Common mistakes.
- Assuming the A-note is risk-free. It is only first in line, and a deep enough loss reaches every holder.
- Ignoring the intercreditor agreement. Control rights in a workout live there, not in the note itself.
- Thinking the borrower cares about the split. The borrower has one loan and one payment, and the split is invisible until a default.
Questions
People also ask.
What is the difference between an A-note and a B-note?
The A-note is senior, paid first, lower in rate and last to take losses, while the B-note is subordinate, higher in yield and first to absorb losses.
Why split a mortgage at all?
It matches different investors' appetites for risk and lets the originator place the conservative and the risky pieces separately.
Who controls a workout?
The intercreditor agreement decides, and it usually gives the senior holder the lead, subject to negotiated limits.
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