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Fix & Flip 201: The Underwriting Deep Dive That Closes Better Deals

You know what LTC and LTARV mean. Now learn how they interact as dual constraints, how interest reserves affect borrower cash needs, how to run sensitivity analysis on tight deals, and how to apply profit tests that give both you and your borrower confidence the deal works.

Intermediate 12 min 3 lessonsLoan ProgramsUpdated 2026-03-14
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Curriculum

1 modules, 3 lessons

Module 1Advanced Underwriting

1Structuring & ConstraintsReading
2Profit Analysis & ExitReading
3Fix & Flip 201 QuizQuiz

Why underwriting depth matters on flip deals

The difference between a deal that funds smoothly and one that stalls in underwriting usually comes down to preparation. Brokers who understand the math behind dual constraints, interest reserve calculations, and profit margin analysis catch problems before they become surprises, and structure deals that underwriters approve faster.

Course topics

Fix & Flip 201 covers the analytical skills that separate order-takers from real advisors.

  • Dual constraint analysis: how LTC and LTARV interact and which one actually caps the loan
  • Interest reserves: how prepaid interest affects cash-to-close and deal feasibility
  • Sensitivity testing: what happens to the deal if renovation costs increase or ARV drops
  • Profit tests: minimum margin thresholds that protect both borrower and lender
  • ROI by experience tier: how returns shift as borrowers move up the experience ladder
  • Geographic restrictions: markets and property types that certain lenders will not touch

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FAQ

Fix & Flip 201 FAQs

Common questions about this course topic.

What is a dual constraint in fix and flip lending?

A dual constraint means the loan amount is limited by both LTC (loan-to-cost) and LTARV (loan-to-after-repair-value) simultaneously. The borrower gets the lower of the two calculations, which prevents over-leveraging on either the cost or value side of the deal.

How do interest reserves work on a flip loan?

Interest reserves are prepaid interest held by the lender and drawn down monthly to cover the payment obligation of the borrower. They reduce monthly cash burden during renovation but increase the total cash needed at closing.

What is the minimum profit margin lenders look for on a flip?

Most lenders want to see at least 10-15% gross profit margin after all costs. Some programs have explicit profit tests while others evaluate feasibility more holistically. A thin margin increases risk for both the borrower and the lender.

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Related Courses

Beginner15 min

Fix & Flip 101: From Purchase to Profit, the Complete Broker Course

Free course on fix and flip lending: LTC, LTARV, ARV, experience tiers, rehab draws, and the full flip deal lifecycle from purchase to profit.

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Advanced20 min

Fix & Flip 301: Rehab Draws, BRRRR Refi & the Edge Cases That Kill Deals

Expert fix and flip course: rehab draw management, scope of work, contractor coordination, BRRRR refi-out strategy, permits, liens, and environmental surprises.

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Intermediate15 min

Underwriting Gym: Scenario Drills That Build Real Confidence

Practice investment loan underwriting with interactive scenarios: DSCR, fix and flip, bridge, and mixed-program drills with real calculators and instant feedback.

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