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Work-in-Progress (WIP) Mortgage: A Complete Guide to Disbursement

Autore: Francesco Zinghinì | Data: 4 Dicembre 2025

Renovating or building a home is a project that combines the desire for innovation with the value of tradition, a dream deeply rooted in Italian culture. Often, bringing this dream to life requires specific financial support. This is where the work-in-progress (WIP) mortgage comes in, a financing solution designed for those who aren’t buying a “turnkey” property but are creating or transforming one over time. Unlike a traditional mortgage, where the entire sum is disbursed at once, a WIP mortgage involves a gradual release of capital. This method follows the construction site step-by-step, ensuring funds are available exactly when they are needed.

This mechanism, which links the disbursement of money to the actual progress of the work, serves as a safeguard for both the bank and the borrower. The lending institution ensures that the property’s value increases progressively, strengthening the mortgage collateral. The borrower, on the other hand, takes on debt gradually and pays interest only on the amounts actually used, making the process more sustainable and manageable. This financial approach is a perfect fit for the Mediterranean mindset, where a house is not just an asset but a life project to be nurtured and enhanced over time.

How a Work-in-Progress Mortgage Works

The operation of a WIP mortgage is intrinsically linked to the construction schedule. The process begins with signing a mortgage contract for the total amount needed to complete the project. However, the sum is not paid out immediately. Disbursement occurs in several tranches, or portions of capital, which are unlocked upon reaching specific stages of the work. Each stage is certified by a technical inspection arranged by the bank. An appraiser visits the construction site to verify that the work has been completed to a professional standard and in accordance with the approved project.

The number and amount of the tranches are agreed upon in the contract and can vary based on the bank’s policies and the nature of the project. Typically, there are between two and five disbursements. A common breakdown, for example, might be 30% at the start, 50% at the halfway point, and the remaining 20% upon completion. The first tranche may be disbursed at closing or, in the case of new construction, once the foundations and roof are in place. Subsequent tranches are released only after positive intermediate inspections. This system ensures that cash flow is always aligned with the actual needs of the construction site.

The Key Role of the WIP Inspection

The inspection is the heart of the work-in-progress mechanism. It is a technical check that serves the dual purpose of protecting the bank and the client. Before each disbursement after the first, the lending institution appoints an appraiser—a qualified professional (usually an architect, engineer, or surveyor)—tasked with inspecting the property. During the site visit, the technician verifies that the work performed conforms to the building plan submitted during the mortgage application process. They also confirm the actual increase in the property’s value.

The appraiser’s report is binding: if the work’s progress is confirmed, the bank proceeds to release the next tranche. Otherwise, the disbursement is suspended until any issues are resolved. It is important to note that the costs of these intermediate inspections are generally borne by the borrower. Although they represent an additional expense, they also provide the client with a valuable external and impartial guarantee of the construction company’s proper execution of the work. To start the process, it is essential to present the invoices issued by the construction company to the bank, which form the basis for the appraiser’s verification.

The Interest-Only Period

A distinctive feature of the WIP mortgage is how repayment is managed during the construction phase, known as the interest-only period. During this time, which can last up to 24 or 36 months, the borrower does not yet repay the principal portion of the loan. The monthly payment consists solely of interest, calculated only on the amount actually disbursed to date. For example, after receiving the first tranche, you will pay interest only on that amount. When the second tranche is released, the interest-only payment will increase to include interest on both disbursed amounts.

This system offers a significant cash flow advantage, as the initial payments are much lighter and more manageable. It allows you to cover construction costs without the burden of a full mortgage payment. The actual amortization schedule, with payments composed of principal and interest, begins only after the work is completed, following the final disbursement and settlement. Although the interest-only period results in a slightly higher total interest cost, it provides indispensable flexibility for managing the financial complexity of a renovation or construction project.

Advantages and Disadvantages to Consider

Choosing a WIP mortgage comes with a series of significant advantages, but also some aspects to consider carefully. The main benefit is prudent debt management. By receiving money gradually, the borrower is financially exposed only for the necessary amounts, reducing risk in case of unforeseen events or work stoppages. If the construction were to halt, the debt to be repaid would be limited to what has already been disbursed. Furthermore, the interest-only payments during the pre-amortization period lighten the financial load during an already expensive phase.

Among the disadvantages, the first to consider is the overall cost. Interest rates for WIP mortgages can be slightly higher than for traditional mortgages, given the bank’s higher perceived risk. Added to this are the costs of the technical inspections required to release each tranche, which are the client’s responsibility. Finally, the duration of the interest-only period, while a cash-flow advantage, increases the total amount of interest paid over the life of the loan. It is therefore crucial to plan the budget carefully, including these ancillary costs, to get a complete picture of the operation.

Application Documents and Requirements

To apply for a Work-in-Progress mortgage, the bank requires more extensive documentation than for a standard purchase mortgage. In addition to the usual personal and income documents for assessing creditworthiness, you must submit a complete file on the real estate project. This typically includes the detailed building plan approved by the municipality, the itemized cost estimate prepared by the construction company, and details about the company itself.

The bank will carefully analyze the project to assess its technical and economic feasibility. The plan’s soundness is crucial for getting the green light. It is essential that the estimated final value of the property, once the work is completed, is consistent with the requested loan amount, respecting the Loan-to-Value (LTV) limits, usually set at 80%. Preparing all documentation carefully, perhaps with the support of a professional like a credit advisor, can speed up the underwriting process and increase the chances of success. This preparatory phase is a time investment that ensures a solid foundation for your home project.

A Practical Example of a WIP Mortgage

Let’s imagine applying for a €100,000 WIP mortgage for a major renovation, to be completed in 18 months. The bank agrees to a disbursement in three tranches: 30% (€30,000) at closing, 50% (€50,000) after 9 months, and the final 20% (€20,000) at the end of the project.

  1. First Tranche: Upon signing the contract, we receive €30,000. For the first 9 months, we will only pay an interest-only payment calculated on this amount.
  2. Second Tranche: After 9 months, the company has completed most of the structural work. We submit the invoices, and the bank sends the appraiser. With their approval, we receive the second tranche of €50,000. The disbursed amount now totals €80,000. For the next 9 months, the interest-only payment will be higher, as it’s calculated on the total amount received.
  3. Third Tranche and Amortization: At 18 months, the work is finished. After the final positive inspection, the bank disburses the remaining €20,000. At this point, the financing is complete. Starting the following month, the interest-only period ends, and the actual amortization plan begins, with payments including principal and interest, calculated on the full €100,000 amount as defined in the original amortization schedule.

This example illustrates how the financing dynamically adapts to the project, providing liquidity in sync with expenses. This type of solution is ideal not only for renovations but also for those opting for a purchase and renovation mortgage.

Conclusion

The Work-in-Progress mortgage proves to be a flexible and secure financial tool, particularly suited to the Italian context, where enhancing real estate assets through renovation and new construction is a well-established practice. Balancing tradition and innovation, it allows for the realization of ambitious projects with prudent and controlled financial management. Its structure, based on gradual disbursements verified by technical inspections, offers a dual guarantee: the bank finances an asset whose value grows over time, while the borrower takes on a financial commitment proportional to the actual progress of their dream.

Although it involves ancillary costs related to inspections and a higher overall interest burden due to the interest-only period, the advantages in terms of security and sustainability often make it the necessary and wisest choice for complex construction projects. Taking on a life project like building or renovating one’s home requires reliable partners: a WIP mortgage, if well understood and planned, can be a fundamental ally in turning a construction site into a home. For optimal planning, it is always advisable to know the documents required for a renovation mortgage and to carefully evaluate every contractual aspect.

Frequently Asked Questions

What exactly is a Work-in-Progress (WIP) mortgage?

A Work-in-Progress (WIP) mortgage is a type of loan specifically designed for the construction or renovation of a property. Unlike a traditional purchase mortgage, the bank does not disburse the entire sum at once. Instead, the capital is paid out in several tranches as the work progresses and is verified. This mechanism allows the applicant to take on debt gradually and provides the bank with progressive collateral, as the amount disbursed is always proportional to the increasing value of the property. During the construction period, you typically pay only the interest on the amount actually received (the interest-only period), and you begin repaying the principal only after the work is completed.

How many times does the bank disburse money during the project?

The number of tranches, or individual disbursements of money, is not fixed but is established in the mortgage contract based on the project and the agreement with the bank. Commonly, disbursements are divided into two or three main phases, but the number can vary depending on the complexity and duration of the work. For example, a plan might include a first tranche to start the construction, one or more intermediate tranches upon reaching specific milestones (like completing the roof and exterior walls), and a final tranche when the work is finished. Each disbursement after the first occurs only after an appraiser has confirmed the completion of the previous stage.

What exactly does the bank’s appraiser check before approving a tranche?

The appraiser, a qualified technician such as an engineer, architect, or surveyor appointed by the bank, plays a crucial role. Before authorizing the disbursement of each tranche, they conduct a site visit to verify that the work has been carried out in accordance with the submitted project plan. Their job is to certify the actual state of progress and the increase in the property’s value. To do this, they rely on project documentation, such as the bill of quantities and cost estimate, and the invoices submitted by the construction company. Their positive technical report is essential for unlocking the next portion of the mortgage. The cost of these intermediate inspections is generally borne by the client.

Is it possible to modify the renovation project mid-stream with a WIP mortgage?

Modifying the renovation project mid-stream is a complex operation and not always possible. Any deviation from the original project, which was approved by the bank and forms the basis for the entire disbursement plan, must be communicated to and approved by the lending institution. If the work undergoes changes, delays, or interruptions, the borrower is only required to repay the amount already disbursed. However, unauthorized changes could lead the bank to suspend subsequent disbursements or apply penalties, as specified in the mortgage contract. It is crucial to maintain open communication with the bank and formalize any changes to avoid jeopardizing the financing.

What happens if the construction costs exceed the amount of the WIP mortgage?

If the total cost of the work exceeds the amount financed by the bank, the difference must be covered by the applicant’s own funds. The WIP mortgage is granted based on an initial estimate and appraisal, and the bank will disburse, at most, the amount agreed upon in the contract. This is a scenario to consider carefully during the planning phase, allowing for a contingency fund for unforeseen events or increases in material prices. If you realize during the project that the funds will not be sufficient, it is generally not possible to increase the mortgage amount in progress. The risk of not completing the work could have consequences for the final amortization plan and the agreements made with the lending institution.