Worked example: Closing Cost in Louisiana

Example inputs

Below is a worked example of a closing cost calculation in Louisiana using DocketMath with jurisdiction-aware rules.

Jurisdiction: Louisiana (US-LA)
Statute used for default timing rule: La. Rev. Stat. Ann. § 9:2800.9
General SOL period (default): 1 year

Because no claim-type-specific sub-rule was found for this example, the calculation uses the general/default 1-year period from La. Rev. Stat. Ann. § 9:2800.9 (not a specialized shorter or longer period). If your situation involves a different claim type, you should verify whether a different rule applies.

To follow along with DocketMath first, use this primary CTA: **/tools/closing-cost

Example scenario (facts you enter)

This example models a timeline using a start date and a closing/event date, then applies that timing to the closing-cost model.

Use these inputs:

• Jurisdiction: Louisiana (US-LA)
• Default timing rule: 1 year (general/default; La. Rev. Stat. Ann. § 9:2800.9)
• Start date: January 15, 2025
• Closing event date you’re evaluating: January 10, 2026
• Estimated closing-cost items (for this example):

  • Filing / admin fees: $450
  • Service / notice costs: $120
  • Document handling: $80
  • Total base costs: $650

If DocketMath accepts a single base-cost subtotal, enter $650. If it requires categories, enter $450, $120, and $80 separately. In either case, the time window created by your two dates is the main driver of the timing adjustment.

Quick input checklist

• Jurisdiction set to US-LA / Louisiana
• Timing rule set to the general/default 1-year period from La. Rev. Stat. Ann. § 9:2800.9
• Start date entered (Jan 15, 2025)
• Closing/event date entered (Jan 10, 2026)
• Base costs entered ($650)

Example run

Let’s run the example the same way DocketMath would conceptually do it: compute the relevant timing window using Louisiana’s general/default 1-year rule, then apply that timing to the closing-cost model.

Run the Closing Cost calculator using the example inputs above. Review the breakdown for intermediate steps (segments, adjustments, or rate changes) so you can see how each input moves the output. Save the result for reference and compare it to your actual scenario.

Step 1: Compute the default deadline window (1-year default)

• Start date: January 15, 2025
• General/default period: 1 year (per La. Rev. Stat. Ann. § 9:2800.9)
• Default end date (one year later): January 15, 2026

Step 2: Compare the evaluation date to the default period

• Closing event date: January 10, 2026
• Default end date: January 15, 2026
• Difference: January 10, 2026 is 5 days before January 15, 2026.

In a timing-dependent model, “within the window” usually means the calculator treats the scenario as occurring before the end of the default period. Even small day-level differences can matter.

Step 3: Apply the timing result to closing costs (illustrative proportional model)

For demonstration purposes, assume the model applies a simplified proportional adjustment based on how much of the default period has “elapsed” as of the closing event.

• Time elapsed from Jan 15, 2025 to Jan 10, 2026: 360 days (using a simplified 365-day year for this example)
• Default period length: 365 days
• Proportional factor: 360 / 365 ≈ 0.9863

Apply that to the base costs $650:

• Estimated closing cost ≈ $650 × 0.9863 = $640.60 (rounded)

Example output (conceptual)

To reproduce this in DocketMath, enter:

• Start: 2025-01-15
• Closing/evaluation: 2026-01-10
• Base costs subtotal: 650

If you have category fields, enter:

• Fees: 450
• Service/notice: 120
• Document handling: 80

Sensitivity check

Sensitivity checks show how small changes in inputs can shift output—especially important for timing-driven models using Louisiana’s general/default 1-year rule (La. Rev. Stat. Ann. § 9:2800.9).

To test sensitivity, change one high-impact input (like the rate, start date, or cap) and rerun the calculation. Compare the outputs side by side so you can see how small input shifts affect the result.

Sensitivity A: Move the closing event 10 days later

Change only:

• Closing event date: January 25, 2026

With the original default end date still at January 15, 2026, the closing event is now 10 days after the end of the default window.

Many strict window-based calculators can produce a sharp change once you cross a cutoff. For illustration, if the model uses a strict within-window rule:

• In-window factor: 0 (outside the window)
• Adjusted closing cost: $650 × 0 = $0

Even if your version of DocketMath uses a different approach, the key thing to validate is whether crossing the end date causes a discontinuous change.

Sensitivity B: Move the start date by 15 days later

Keep closing event date fixed at January 10, 2026, but change:

• Start date: January 30, 2025

Then the default end date becomes January 30, 2026 (still 1 year later). The closing event is now 20 days before that new default end date.

Because the event is earlier relative to the end date, a proportional timing factor would typically be higher than in the original run, which would push the estimated closing cost up from $640.60 (assuming the calculator uses proportional logic as in the example model).

Sensitivity C: Change base costs by +20%

Change only base costs:

• Original base costs: $650
• New base costs: $780

If the timing factor stays the same (0.9863), then:

• Adjusted closing cost ≈ $780 × 0.9863 = $768.71

This test confirms the basic behavior you’d expect in most closing-cost models:

• Date changes often affect eligibility/timing factors.
• Cost changes typically scale the result.

Quick “sanity check” workflow

When you run DocketMath:

• Try one scenario just before the default end date and one just after it.
• Confirm whether the output changes smoothly or jumps when you cross the end date.
• Confirm that adjusting costs scales the result roughly proportionally.

Reminder: Timing rules can be fact-specific. Use this as a calculator-validation method, not as legal advice.

Related reading

• Average closing costs in Alabama — Rule summary with authoritative citations
• Average closing costs in Alaska — Rule summary with authoritative citations
• Average closing costs in Arizona — Rule summary with authoritative citations