Modeling Question (Construction Loan IDC)

Project finance analyst here. I do modelling for energy project, and from what I understand, the way we set up construction loans are similar if not the same as in real estate. 

That being said in PF, a construction loan consists of the principle as well as the interest during consutrction. I don't understand why lenders do this, and how they make money off these loans.

Take the classic example of circularity with construction loans: let's say that you need to borrow $100, but there's a 50% fee for every dollar you borrow. Now you need to borrow $150. Again there's that 50% fee, now you need $175 etc... Run this circularity a few times and you get $100 in fees, for a total loan of $200 that you owe the lender.

But why would the lender make this deal? The lender just gave you $200, and at the end of the construction period, you pay the lender $200. If the lender is lending you the interest portion, how does he/she make money??

8 Comments
 

When the lender “lends” 200 in your example, they only actually disburse 100 to fund capex. No money changes hands on the 100 of interest. They will then receive 200 at the end of the project, and make 100 in profit.

 

Interest = 5.00%

Month 1 Draw = $100,000; Month 1 Interest = ~$417

Month 2 Draw = $150,000; Month 2 Interest = ???

In a CRE development model, would Month 2 interest factor in the Month 1 capitalized interest? Or is this really up to the loan docs. 

 

First off, your understanding of interest is completely wrong. $100 loan fully drawn will accrue interest at like 5% per year. So if your project takes 1 year to build, you will add $5 to the total cost to build.

Secondly, the number one thing people who write loans care about is how are they going to get their money back. You will never secure or draw on the $100 loan in the first place without showing the lender you have arranged a way to take them out when the project is fully built. Best case you have someone lined up to buy for $120 something that cost you $100 of hard costs to build and $5 of interest to finance, leaving $15 of profit for you. If the take out fails to materialize for whatever reason, then they take the keys to the project you just built with their money.

 

What about my understanding of interest is wrong? A construction loan is modeled as being the sum of principal and interest/ fees. Say you have $100 (unlevered) in capex drawn over 12 months and IDC is $10. The total construction loan would be sized at $110. That's how energy projects (and RE to the best of my knowledge) are financed in the construction stage. I don't think you understand what I am asking or I am not being clear -  would it be helpful if I sent a screenshot of a sample construction draw and loan sizing model? Either way, I think I understand now: accrual =/= cash. 

What you mention regarding banks isn't really relevant to my question. Construction loans are almost always paid back at COD and replaced with backleverage. Banks are primarily concerned with this aspect of the project not necessarily operations (assuming repayment at COD). 

And btw a construction loan is accruing interest at more than 5% on an annualized basis (SOFR + ~250BPS). Last I checked SOFR was at like 440BPS. 

 

I misread but q also less than clear. If interest is accrued into the loan balance then yes the ultimate takeout is extremely relevant as that's when the lender gets its capital and return (to your core question about how they make money).

 

Cum incidunt quasi voluptate vel. Voluptas laboriosam ducimus ad dolores cumque vel. Aut sit quo est.

Iusto repellendus possimus vero tenetur est. Quaerat tenetur nobis temporibus enim animi. Ipsam et saepe et eum tenetur maxime et eum.

Career Advancement Opportunities

May 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.8%
  • JPMorgan 01 98.2%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

May 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 01 98.8%
  • Evercore 01 98.2%
  • BMO Capital Markets 12 97.6%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

May 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.8%
  • Morgan Stanley 05 98.2%
  • JPMorgan No 97.7%
  • BMO Capital Markets 12 97.1%

Total Avg Compensation

May 2026 Investment Banking

  • Vice President (14) $434
  • Associates (43) $259
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (75) $151
  • Intern/Summer Analyst (65) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

1
redever's picture
redever
99.2
2
kanon's picture
kanon
99.0
3
BankonBanking's picture
BankonBanking
99.0
4
Secyh62's picture
Secyh62
99.0
5
Betsy Massar's picture
Betsy Massar
98.9
6
dosk17's picture
dosk17
98.9
7
GameTheory's picture
GameTheory
98.9
8
CompBanker's picture
CompBanker
98.9
9
DrApeman's picture
DrApeman
98.9
10
numi's picture
numi
98.8
success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”