Find a Reserve Gap Before a Chicago Two-Flat Turnover

Cash already committed to other work may not be available to cover vacant months. The worksheet for this decision tracks turnover and vacancy cash target and keeps the other amounts visible so you can reconcile the estimate with your own paperwork. The worked example uses fictional figures in U.S. dollars and is specific to the decision you are modeling in Chicago, Illinois. Replace them with confirmed values for your own home purchase or mortgage decision before relying on the comparison.

Start with the documents you can reconcile

Use the property’s actual lease, vacancy plan and mortgage payment. Separate the owner’s own living costs from expenses of getting the other unit ready. Include only the mortgage cash you want this reserve to cover.

Use the two-flat’s legal unit configuration, lease and building records before assigning a rent assumption. An inspection and local permit information can help you identify which work and dates need verification. Avoid budgeting rent for an occupied unit and a turnover reserve for the same period without checking the dates. The reserve scenario helps show the cash needed while the unit is unavailable. It does not determine what a lender will accept as rental income.

Keep an estimate column and a confirmed column while you gather the inputs. A blank line should mean you are still waiting for a number, while a zero should mean you confirmed no amount applies. If the number is unsettled, run a range or a separate downside case instead of entering zero in a way that makes the decision appear cheaper. Record the date of each figure so it is clear when to refresh the worksheet.

Worked example with two scenarios

The reference case uses the calculator’s starting values. This guide tests what happens when you change cash already reserved from $6,500.00 to $4,100.00. All unchanged inputs are kept at their reference values, so the difference below reflects the specified changes. The table shows the inputs to compare before you interpret any of the totals.

In the reference case, turnover and vacancy cash target is $9,600.00, with mortgage cash during vacant months of $6,300.00 and reserve shortfall of $3,100.00. In the scenario for this guide it stays at $9,600.00. Mortgage cash during vacant months is $6,300.00, and Reserve shortfall is $5,500.00. The difference in the first row is $0.00 at the displayed precision. Use the secondary rows to see where that difference comes from. They represent components or additional checks, so adding every result together would combine amounts that can describe the same money from different angles.

Keep reserve categories distinct and confirm which amounts can be moved.

Read the timing and cost rows separately

Think about the first cash event in the scenario, the date the modeled amount becomes due, and the date any offsetting receipt is usable. Write each event on its own line and include whether the value is a firm amount or a quote. The result table combines inputs for comparison, but your calendar determines when the account needs to contain the money. In particular, a positive ending balance can coexist with a shortfall earlier in the window if the inflow arrives afterward.

Before interpreting the result as savings, identify exactly what has been included in the first row. A smaller cash requirement today can accompany a later payment. A lower fee can coincide with a different interest charge. Use the row labels as written, and compare future obligations or alternative offers on a separate page when those items fall outside the selected window. That keeps a useful planning estimate from becoming a broader claim about total cost.

Check which inputs move the result

If vacant months changes from 3 to 4, turnover and vacancy cash target rises to $11,700.00. In the same run, mortgage cash during vacant months becomes $8,400.00 and reserve shortfall becomes $7,600.00. This comparison holds every other entry constant, so it isolates that input. If your offer changes more than one amount at once, put all the revised amounts into a separate scenario and compare the complete set of results.

If mortgage cash to cover per vacant month ($) changes from $2,100.00 to $2,310.00, turnover and vacancy cash target rises to $10,230.00. In the same run, mortgage cash during vacant months becomes $6,930.00 and reserve shortfall becomes $6,130.00. This comparison holds every other entry constant, so it isolates that input. If your offer changes more than one amount at once, put all the revised amounts into a separate scenario and compare the complete set of results.

If one-time turnover cash ($) changes from $3,300.00 to $3,630.00, turnover and vacancy cash target rises to $9,930.00. In the same run, reserve shortfall becomes $5,830.00. This comparison holds every other entry constant, so it isolates that input. If your offer changes more than one amount at once, put all the revised amounts into a separate scenario and compare the complete set of results.

A small change that produces no movement in the headline result can still be worth noting. Some worksheets apply a cap or floor, and the first row may stay flat until an input crosses it. Look at the secondary amounts and test the actual limit rather than extrapolating from one small change. Save the reference settings first so that a later comparison starts from the same assumptions.

What this worksheet assumes

Assumes no rent contribution during the entered vacant months and includes a one-time turnover budget. It is not a lender qualifying-income calculation.

The output uses the values you supply and rounds displayed amounts for readability. A lender, school, vendor or other party may use different dates, fees, credit treatment or rounding. If a statement and the estimate disagree, first check that the figures refer to the same dates and the same underlying balance. Then separate formula differences from missing cash items. This makes it easier to ask a targeted question about a particular line rather than trying to reconcile a single total.

Before you act on the estimate

Confirm occupancy and any property-specific requirements before assuming rental income will begin. Use bids and lease dates to set the turnover budget and window.

Take the scenario closest to your actual situation and put the opening cash, dated receipts and dated obligations in order. Flag any entry you cannot confirm and identify the first payment that depends on it. If a supplier, lender or other party changes that figure, update that entry first and rerun the comparison. Save both versions with the dates they were prepared so another person can see what changed and which documents support the revision.

If two alternatives are close, check what would make their order switch. For example, one alternative may depend on an unconfirmed fee or receipt, while the other depends on a date or rate you already have in writing. The sensitivity runs above help distinguish a difference that survives a small revision from one that disappears when the input moves. In your final notes, state what you verified and which assumptions still need a quote or statement.

What should I do if I only have a rough figure?

Use the rough amount as a labeled starting point and run a second version using a plausible less favorable amount. Keep the exact written quote when it arrives and replace the estimate. If the updated figure changes the headline result but leaves the earliest payment unchanged, still check that the cash is available by the relevant date. If both the amount and the date change, update the payment calendar as well as the worksheet.

When should I run the numbers again?

Recalculate when a fee, installment, credit, cost or payment date changes, and once more when you have the paperwork that will govern the decision. Use the same units and time window in both versions. If the only change is timing, keep the amount the same in your first comparison so you can see that effect separately. Compare the new result with the written figures rather than carrying forward an older estimate.

Open the Chicago Two-Flat Turnover Loan Reserve Calculator to substitute your own inputs. Budget Mortgage Cash During a Chicago Two-Flat Vacancy and Add Turnover Repairs to a Chicago Two-Flat Reserve and Stress-Test a Higher Chicago Two-Flat Mortgage Payment and Compare a Shorter Chicago Two-Flat Turnover Timeline cover other scenarios for the same worksheet. See City of Chicago building permit information for local context and CFPB Loan Estimate explainer for the related disclosure or program background.

Explore this topic further

Check your assumptions with these tools and related guides.

Try a relevant calculator

• Chicago Two-Flat Turnover Loan Reserve Calculator — Estimate turnover and mortgage cash to reserve during a modeled Chicago two-flat vacancy.
• Auto Down Payment Cash Reserve Calculator — Find a vehicle down payment that leaves room for upfront costs and a cash reserve.
• Loan Payment Income Gap Reserve Calculator — Estimate the cash reserve needed to cover living costs and a loan payment through an income gap.
• Student Loan Fixed Payment Gap Calculator — Estimate a payment reserve for a fixed-rate student loan during a period with no income allocated to the installment.

Read related guides

• Add Turnover Repairs to a Chicago Two-Flat Reserve
• Compare a Shorter Chicago Two-Flat Turnover Timeline
• Stress-Test a Higher Chicago Two-Flat Mortgage Payment