Worked example: Closing Cost in South Dakota
6 min read
Published April 15, 2026 • By DocketMath Team
Example inputs
Below is a worked example of a closing cost calculation in South Dakota using DocketMath with jurisdiction-aware rules.
Because your brief specifies no claim-type-specific sub-rule, this example uses South Dakota’s general default statute of limitations (SOL) period for the relevant timing rule:
- General SOL period: 3 years
- General statute: SDCL 22-14-1
Note: This example applies the general/default SOL period. If a case involves a specialized SOL rule for a specific claim type (not provided in the brief), the timing logic could change.
Scenario (what you’re solving)
You want to estimate a closing cost figure that depends on:
- a base closing cost amount
- a date-based timing component tied to the 3-year SOL framework (general/default under SDCL 22-14-1)
Assumptions for the example
Use these inputs in DocketMath (calculator: closing-cost) for US-SD:
| Input | Value | Why it matters |
|---|---|---|
| Jurisdiction | US-SD | Enables South Dakota rules |
| Base closing cost | $3,250 | Starting figure before timing adjustments |
| Event date | 2026-01-15 | The anchor date for elapsed time |
| Filing date | 2023-01-20 | Used to compute whether timing falls within the SOL window |
| SOL length used | 3 years | Default SOL period per SDCL 22-14-1 |
| Daily accrual rate (timing adjustment) | $2.50/day | Converts “days elapsed” into a cost delta |
Timing interpretation (how the example models it)
We’ll treat the timing component as follows:
- Compute days elapsed between the filing date and event date.
- Compare elapsed time to the 3-year SOL period.
- Apply a timing adjustment:
- If elapsed time is within 3 years, adjustment is $0 (no SOL-driven bump)
- If elapsed time exceeds 3 years, add an incremental amount using the daily rate
This is a computational model for demonstration—not legal advice.
Checkbox checklist for sanity before running the example:
- Confirm you’re using **South Dakota (US-SD)
- Confirm you have dates in YYYY-MM-DD
- Confirm the calculator is set to use the general/default 3-year SOL (SDCL 22-14-1) because no special sub-rule was provided
- Confirm your daily accrual rate aligns with your underwriting or internal costing model
Example run
Now run the example in DocketMath → /tools/closing-cost using the inputs above.
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: Calculate elapsed time
- Filing date: 2023-01-20
- Event date: 2026-01-15
From 2023-01-20 to 2026-01-15 is (approximately) 1,096 days (non-leap-year and leap-year effects around 2024 are captured by the day-count method).
Step 2: Translate 3 years into days
A strict “3 years” window isn’t always exactly 1,095 days because of leap days. For a practical tool run, DocketMath’s jurisdiction-aware logic should treat the SOL framework as a date-based comparison rather than a constant day count.
For purposes of this worked example, we’ll use the equivalent window:
- 3 years from the filing date → up to roughly 2026-01-20
Under that comparison:
- Event date 2026-01-15 is within the 3-year window ending around 2026-01-20.
- Therefore, no SOL-driven timing bump is triggered.
Step 3: Apply closing cost formula
Base closing cost: $3,250
Timing adjustment: $0 (because the event date falls inside the 3-year SOL period window)
Estimated closing cost output:
- $3,250 + $0 = $3,250
What the tool would display (conceptually)
You should expect output sections similar to:
- Computed elapsed time (days)
- SOL window status (within/exceeded)
- Adjustment computed (and why it’s $0 in this run)
- Final closing cost figure
If you want to reproduce the calculation quickly: open DocketMath closing cost tool and plug in the dates and amounts.
Warning: If your filing date and event date are swapped (a common data entry issue), elapsed time can flip from “within SOL” to “outside SOL,” changing the adjustment by days × $2.50/day in this example model.
Sensitivity check
Sensitivity checks answer a practical question: How sensitive is the closing cost to date choices? Below are two variations that keep everything constant except the event date.
Base assumptions reused:
- Jurisdiction: US-SD
- Base closing cost: $3,250
- Filing date: 2023-01-20
- Daily rate: $2.50/day
- SOL rule: **3 years under SDCL 22-14-1 (general/default period)
Variation A: Move event date forward by 10 days (still within the window)
- Event date: 2026-01-25
- Compare to ~3-year end around 2026-01-20
In this variation, the event date is likely outside the window by about 5 days (depending on the exact day-count convention).
Timing adjustment:
- If exceeded by 5 days: 5 × $2.50/day = $12.50
Estimated closing cost:
- $3,250 + $12.50 = $3,262.50
Variation B: Move event date forward by 60 days (meaningfully outside)
- Event date: 2026-03-21
Now the event date is clearly beyond the 3-year window. If we estimate the exceedance at roughly 60 days beyond the window:
Timing adjustment:
- 60 × $2.50/day = $150.00
Estimated closing cost:
- $3,250 + $150.00 = $3,400.00
Results table (quick comparison)
| Scenario | Event date | SOL window status (by model) | Exceeded days (approx.) | Timing adjustment | Closing cost |
|---|---|---|---|---|---|
| Baseline | 2026-01-15 | Within | 0 | $0.00 | $3,250.00 |
| A | 2026-01-25 | Likely outside | ~5 | $12.50 | $3,262.50 |
| B | 2026-03-21 | Outside | ~60 | $150.00 | $3,400.00 |
Checklist for sensitivity runs:
- Change one variable at a time (event date only)
- Keep base cost and daily rate constant
- Confirm the tool uses the general/default 3-year SOL per SDCL 22-14-1
- Record the difference in output, not just whether it changes
Pitfall: If a dataset uses different date formats (e.g., 1/15/2026 vs 2026-01-15), automated day counts can shift by 1 day—small enough to hide in review, big enough to alter the timing adjustment when the daily rate is non-trivial.
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
