Watch Out: The Hidden Gotchas in Fix and Flip Loans

Written by JJ Lunsford, Co-founder and CEO of Harmonial | Last updated: February 2026
Harmonial is a marketplace connecting real estate investors with 30+ private lenders for hard money, fix and flip, bridge, and DSCR loans. Our team has placed $500M+ in loans in this space, and we update our guides to reflect what we actually see across our lender network.

TL;DR: Fix and Flip Loan Gotchas at a Glance

Gotcha	What It Costs You	How to Spot It
Dutch interest	Interest on undrawn rehab funds from day one	Ask lender directly: dutch or non-dutch?
Hidden lender fees	Hundreds to thousands at closing	Request full fee schedule, check effective origination rate
Capitalized interest	Growing loan balance, surprise at payoff	Look for "no payments" or "deferred interest" language
Extension fees	0.5% to 1.5% per extension	Read extension terms before signing
No contingency in rehab budget	Out of pocket when costs run over	Always build 10 to 15% contingency into your budget
Payoff fees and title restrictions	Surprise costs at loan payoff	Ask about payoff fees and required title companies upfront
Unrealistic appraisal or credit assumptions	Repriced loan at closing	Be conservative on ARV and honest about your credit profile

Hard money and fix and flip loans are powerful tools. They close fast, fund rehab budgets, and make deals possible that conventional financing never could. But the space is also less standardized than conventional lending, which means the gap between a great loan and an expensive one is wider than most borrowers realize.

None of the gotchas in this guide are illegal. Most are not even unethical. They are features of how these loans are structured, and lenders are not always motivated to explain them clearly. The investors who get hurt are almost always the ones who did not know what to look for, not the ones who were deceived outright.

Here is everything you need to know before you sign.

Gotcha 1: Dutch Interest

What it is: On fix and flip loans with a rehab holdback, your lender keeps the renovation funds in reserve and releases them as you complete work through a draw schedule. Dutch interest means you pay interest on the full loan amount from day one, including the portion sitting in reserve that you have not drawn yet and cannot spend yet.

What it costs you: Say you take out a $300,000 loan with a $200,000 purchase component and a $100,000 rehab holdback. With dutch interest, your interest accrues on all $300,000 from closing day, even though $100,000 is still sitting in the lender's reserve account. At a 10% annual rate, that is roughly $833 a month in interest on money you do not have yet. Over a 12-month rehab, you could pay $5,000 to $8,000 or more in interest on funds you never touched during most of the project.

Non-dutch interest charges you only on what has been disbursed. As you draw rehab funds, your interest-bearing balance grows. This is the more borrower-friendly structure and can save meaningful money on larger rehabs.

How to protect yourself: Ask every lender directly before you apply: is this loan dutch or non-dutch interest? It is a simple question and the answer matters. Use Harmonial's scenario calculator to model the true cost of each structure on your specific deal so you can compare apples to apples across lenders.

See also: What Is Dutch Interest? (guide coming soon)

Gotcha 2: Hidden Lender Fees

What it is: Every lender charges origination points, which are stated upfront and easy to compare. What is harder to compare are the additional fees that vary by lender and often do not show up until you receive a loan estimate or closing disclosure: processing fees, underwriting fees, document preparation fees, administrative fees, wire fees, and others.

What it costs you: A lender advertising a low origination rate of 1 point might look significantly cheaper than a competitor at 2 points. But if the first lender stacks $3,000 in processing and underwriting fees on a $300,000 loan, the effective cost difference disappears or reverses entirely. This is one of the most common ways investors get surprised at closing, and it is especially frustrating when you have already committed to a lender and are too far into the process to easily switch.

How to protect yourself: Always ask for a complete fee schedule before you commit, not just the rate and origination points. Better yet, use Harmonial's effective origination rate calculation, which bundles every lender fee into a single comparable number so you can see the true cost of each offer side by side. A lower headline rate with higher fees can easily be more expensive than a higher rate with minimal fees, depending on your loan size and hold time.

See also: How to Read a Hard Money Term Sheet (guide coming soon)

Gotcha 3: Capitalized Interest, Also Called Deferred Interest or No-Payment Loans

What it is: Some lenders offer fix and flip loans with no monthly interest payments required during the loan term. Instead of paying interest monthly, the interest accrues and is added to your loan balance. You pay it all at once when the loan is paid off at sale or refinance. This structure is sometimes marketed as "no payments" or "deferred interest."

What it costs you: The appeal is obvious. You preserve cash during the rehab instead of making monthly payments, which helps if you are running lean. The trade-off is that your loan balance grows every month. On a $300,000 loan at 10%, that is $2,500 a month in accruing interest. After 12 months your payoff is not $300,000, it is $330,000. After 18 months it is $345,000. If your deal margin is tight, that growing balance can eat into your profit or, in a worst case, push you underwater if the rehab runs long and the market softens.

Capitalized interest is not a scam. For the right investor on the right deal it can be a useful cash flow tool. But you need to model your payoff number at every possible timeline before you agree to it, not just at the expected close date.

How to protect yourself: Run a payoff projection at your expected timeline, then run it again at 3 months longer and 6 months longer. Make sure your deal still works in the extended scenarios. If the math gets uncomfortable quickly, a loan with monthly payments may serve you better even if it is less convenient.

See also: Pros and Cons of Capitalized Interest on Fix and Flip Loans (guide coming soon)

Gotcha 4: Extension Fees

What it is: Most fix and flip loans have a term of 12 to 18 months. If your project runs long and you need more time, most lenders will grant an extension but will charge a fee for it, typically expressed as additional points on the loan balance.

What it costs you: Extension fees typically run 0.5% to 1.5% of the loan balance per extension period, which is usually 3 to 6 months. On a $300,000 loan, a 1% extension fee is $3,000. If you need two extensions, that is $6,000 in costs you did not budget for, on top of the additional months of interest you are carrying. On a deal with tight margins, extension fees can be the difference between a profit and a break-even or loss.

How to protect yourself: Read your extension terms before you close, not after you need one. Know the fee, the maximum number of extensions allowed, and whether the lender has discretion to deny an extension. Then build your project timeline conservatively. If you think the rehab will take 4 months, budget for 6. If you think you will sell in 3 months after completion, budget for 5. The cost of building in buffer is zero. The cost of needing an extension you did not plan for is real.

See also: What Is an Extension Fee? (guide coming soon)

Gotcha 5: No Contingency in Your Rehab Budget

What it is: This one is less about lender behavior and more about a mistake borrowers make when structuring their loan. When you submit a rehab budget to a lender, that budget determines your holdback amount. Many lenders will not allow you to increase the holdback after closing. If your rehab runs over budget, which it often does, the additional costs come out of your own pocket.

What it costs you: Rehab cost overruns are extremely common, especially on older properties with deferred maintenance, any project involving plumbing or electrical behind walls, or deals where your contractor's initial estimate was optimistic. A 10% overrun on a $100,000 rehab budget is $10,000 you need to find somewhere. A 20% overrun is $20,000. If you did not build contingency into your budget, you are paying that out of pocket or scrambling for bridge funds at an inconvenient moment.

How to protect yourself: Always build a contingency line into your rehab budget, typically 10 to 15% of total estimated rehab cost. Submit it as part of your scope of work from the start. Most lenders will fund a reasonable contingency as part of the holdback. It is far better to have it and not need it than to need it and not have it. If you do not spend the contingency, undrawn holdback funds are simply not accessed and you do not pay interest on them under a non-dutch structure.

Gotcha 6: Payoff Fees and Required Title Companies

What it is: Most loan payoffs are straightforward: you sell or refinance, the title company wires the lender their payoff amount, and you are done. Some lenders, however, charge a separate payoff processing fee. A small number of lenders also require that you use a specific title company for the payoff transaction, and if you use a different one, you may face an additional fee or complication.

What it costs you: Payoff fees are typically modest, often $100 to $300, but they are worth knowing about. Required title company clauses are rarer but can be more disruptive if your buyer or your refinance lender has a preferred title company that conflicts with your lender's requirement. Discovering this late in the process when you are trying to close a sale can cause delays.

How to protect yourself: Ask two simple questions before you commit to any lender. First, is there a payoff processing fee and what is it? Second, are there any restrictions on which title company can handle my payoff? Both are easy to ask upfront and easy to overlook until they matter.

Gotcha 7: Assuming Your Quoted Terms Are Guaranteed

What it is: Most lenders quote terms based on the information you provide about your credit, the property value, and your experience. If any of those inputs change between the quote and closing, the terms can change too. This is not a bait and switch. It is how loan pricing works.

What it costs you: The most common version of this is an ARV that comes in lower than expected at appraisal. If you told the lender you expected a $400,000 ARV and the appraisal comes in at $360,000, your loan amount based on 75% of ARV drops from $300,000 to $270,000. That is $30,000 less capital than you planned for. Similarly, if your credit score pulls lower than you expected, perhaps due to a recent inquiry or a balance you forgot about, you may move into a different pricing tier.

How to protect yourself: Be conservative and accurate when you provide information to a lender. Do not use an optimistic ARV to get a better initial quote and assume the appraisal will confirm it. Know your actual credit score before you apply. The closer your application inputs are to reality, the fewer surprises you will encounter at closing. At Harmonial we can help you think through realistic assumptions before you apply so you are not caught off guard when the formal numbers come in.

The Full Gotcha Checklist: Questions to Ask Before You Sign

1. Is this loan dutch or non-dutch interest on the rehab holdback?
2. What is the complete list of lender fees beyond origination points, and what is the effective origination rate?
3. If this loan has deferred or capitalized interest, what is my projected payoff balance at 12, 18, and 24 months?
4. What are the extension terms, the fee per extension, and the maximum number of extensions allowed?
5. Does my rehab budget include a 10 to 15% contingency, and will the lender fund it as part of the holdback?
6. Is there a payoff processing fee?
7. Are there any restrictions on which title company handles my payoff?
8. What would change my quoted terms between now and closing, and what inputs is my quote based on?

Why This Is Harder to Navigate Alone

The challenge with all of these gotchas is that they are buried in loan documents and term sheets that use different terminology across different lenders. One lender calls it a processing fee, another calls it an administrative fee, another rolls it into a higher origination point and does not itemize it at all. Without a standardized way to compare, you are essentially reading different languages and hoping you are not missing something.

Harmonial's quote comparisons are standardized across all lenders in our network. We calculate effective origination rates that bundle every fee, flag loan structures that carry higher risk of the gotchas above, and present everything side by side so you can make a genuinely informed comparison. We have seen what catches investors off guard across hundreds of loans and we build that knowledge into how we present your options.

Free to apply. No credit pull. Lenders pay us at close.

See: What Is a Hard Money Loan? and Working with a Broker vs Using a Marketplace: How Harmonial Is Different (guide coming soon).

Frequently Asked Questions

What is the most expensive gotcha on a fix and flip loan?

It depends on your deal, but dutch interest and hidden lender fees are the most consistently costly across the most borrowers. Dutch interest on a large rehab holdback over a 12 to 18 month project can run into the thousands. Hidden fees can add 0.5 to 1% or more to your effective cost without being obvious in the rate. Both are avoidable with the right questions and the right comparison tools.

How do I know if my lender is charging dutch interest?

Ask directly before you apply: is interest charged on the full loan amount including the rehab holdback from day one, or only on funds disbursed? Any legitimate lender will answer this clearly. If you get a vague answer, ask again or ask for it in writing.

Is capitalized interest always a bad deal?

No. For investors who need to preserve cash during a rehab, deferred interest can be genuinely useful. The key is modeling your payoff at multiple timelines before you agree to it, not just your expected close date. If your deal margin holds up even at 6 months longer than planned, capitalized interest may be fine. If the math breaks down quickly, monthly payments are safer.

What is a reasonable extension fee?

Most extension fees run 0.5% to 1.5% of the loan balance per extension period. Below 0.5% is favorable. Above 1.5% is on the high end and worth pushing back on or factoring heavily into your decision. Always know your extension terms before you close, not when you need one.

What happens if my rehab runs over budget and I did not include a contingency?

You cover it out of pocket. Most lenders will not increase your holdback after closing. If you cannot fund the overrun yourself, you may need to pause construction, which can cause its own cascade of problems including contractor delays, permit expirations, and timeline blowouts that trigger extension fees. Building contingency into your budget from the start is significantly cheaper than the alternative.

Can a lender change my terms at closing?

A legitimate lender will honor quoted terms if your application inputs are accurate. Terms change when the underlying facts change: the appraisal comes in different than expected, your credit pulls differently, or your timeline or deal structure shifts. The best protection is being accurate and conservative in your application rather than optimistic. If a lender tries to reprice at closing with no material change in your application inputs, that is a red flag and worth escalating or walking away from if possible.

How do I find out if there is a payoff fee?

Ask directly: is there a payoff processing fee, and what is it? Also ask: are there any requirements about which title company handles my payoff? Both questions take 30 seconds and can save you a surprise at a stressful moment.

What is an effective origination rate and how is it calculated?

The effective origination rate is a single number that combines your stated origination points and all additional lender fees into one comparable figure, expressed as a percentage of the loan amount. It lets you compare the true cost of two loans with different rate and fee structures without having to manually add up and convert every line item. Harmonial calculates this for every quote in your comparison so you never have to decode lender language on your own.

Should I always include a contingency in my rehab budget?

Yes, virtually always. The standard recommendation is 10 to 15% of your estimated rehab cost. Older properties, anything with plumbing or electrical behind walls, and any project where you have not done a thorough inspection before closing warrant the higher end of that range. The contingency costs you nothing if you do not use it, and it can save your deal if you do.

My lender requires a specific title company for payoff. Is that normal?

It is not common but it does happen. If you encounter this, find out early whether your buyer's agent, your refinance lender, or your preferred closing attorney has a conflicting requirement. Title company conflicts discovered late in a closing can cause real delays. Knowing about any restrictions before you commit to the loan gives you time to plan around them.

How we keep this accurate: The Harmonial team works with 30-plus active lenders daily. Rate ranges, underwriting standards, and market conditions change. We update our guides regularly to reflect what we are actually seeing across our lender network.