Worked example: interest in New York

Example inputs

Run this scenario in DocketMath using the Interest calculator.

Below is a worked example of how interest calculations can look in New York using DocketMath’s interest calculator. This walkthrough focuses on the time window and interest computation mechanics. It’s not legal advice and won’t substitute for checking the specific facts of your situation (for example, what date interest starts, and what interest rate applies).

Key New York rule used for timing (general/default)

New York uses a 5-year general statute of limitations for many civil claims. In criminal procedure context, the relevant general limitation language appears in N.Y. Crim. Proc. Law § 30.10(2)(c), which provides a five-year period.

Source: https://www.nysenate.gov/legislation/laws/CPL/30.10

Because no claim-type-specific sub-rule was identified here, this example uses this general/default 5-year period as the timing baseline.

Scenario (numbers you can swap)

Assume:

• Event date (start point for the calculation): 2022-01-15
• End date (through which interest runs): 2027-01-14
• Principal (amount subject to interest): $10,000.00
• Annual interest rate: 8% (0.08)
• Interest compounding: simple interest (no compounding), calculated on a day-count basis

Why these dates? They represent almost exactly 5 years, matching the baseline duration used in this example (consistent with the five-year rule referenced in N.Y. Crim. Proc. Law § 30.10(2)(c)).

Inputs checklist (what you’d enter in DocketMath)

Use DocketMath to run the math, and enter inputs aligned with the scenario. Open the tool at: /tools/interest

In DocketMath, enter:

• Principal: $10,000.00
• Annual rate: 0.08
• Start date: 2022-01-15
• End date: 2027-01-14
• Method: simple interest (day-based)

If your tool offers options like “daily rate” or “compounded vs. simple,” choose the setting that matches your intended model.

Example run

You can run this worked example directly in DocketMath’s interest calculator at /tools/interest.

Run the Interest 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 time span in days

From 2022-01-15 to 2027-01-14, the tool should compute an exact day count based on its internal day-count convention.

For illustration in this example model, assume the tool calculates a 1,826-day interval (i.e., essentially a ~5-year window that spans a leap year).

Step 2: Convert annual rate to a daily factor (simple interest model)

For simple interest on a day-count basis, the common approach is:

• Daily rate = Annual rate ÷ 365
• Total interest = Principal × Annual rate × (days ÷ 365)

So:

• Principal × rate = $10,000 × 0.08 = $800 per year
• Total interest = $800 × (1,826 ÷ 365)

Compute the fraction:

• 1,826 ÷ 365 ≈ 5.0027 years
• Total interest ≈ $800 × 5.0027 = $4,002.16 (rounded)

Step 3: Output interest and total amount

• Interest: ≈ $4,002.16
• Total (principal + interest): $10,000.00 + $4,002.16 = $14,002.16

What this means in practice

If you’re modeling exposure or settlement figures under a five-year limitation timing assumption (using N.Y. Crim. Proc. Law § 30.10(2)(c) as the general five-year baseline), interest grows roughly linearly with time under simple interest.

In this example:

• A $10,000 principal at 8% over about a 5-year window produces roughly ~$4,000 in interest.

Sensitivity check

Interest outcomes can change significantly from small input shifts. Here are practical “what-if” variations you can test quickly in DocketMath.

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.

1) Shift the end date by 30 days

Keep everything else the same:

• Principal: $10,000.00
• Rate: 8%
• Start: 2022-01-15
• End A (baseline): 2027-01-14
• End B (add 30 days): 2027-02-13

Under simple interest, the additional interest is approximately:

• Additional interest ≈ Principal × rate × (30 ÷ 365)
• ≈ $10,000 × 0.08 × (30 ÷ 365)
• ≈ $800 × 0.08219
• ≈ $65.75

Result (approximate):

• Baseline interest: ~$4,002.16
• New interest: ~$4,067.91
• Total increases by about $65.75

2) Change annual rate from 8% to 6%

Use the baseline dates and principal, but rate = 6%:

• Principal × rate = $10,000 × 0.06 = $600 per year
• Total interest ≈ $600 × 5.0027 ≈ $3,001.62

Result:

• Interest drops by about $1,000 compared to the 8% scenario over a ~5-year window.

3) Compare “simple interest” vs. “compounded” (if your tool supports it)

If DocketMath’s calculator lets you choose compounding:

• Simple interest increases in a straight-line way with time.
• Compounded interest increases faster because earlier interest can start generating additional interest.

Even if the legal timing is unchanged, this modeling choice can move results meaningfully.

4) Timing sensitivity tied to the 5-year baseline

Because this worked example uses the general/default five-year period (per N.Y. Crim. Proc. Law § 30.10(2)(c)) and does not identify a claim-type-specific sub-rule, the results are particularly sensitive to:

• the start date you enter for accrual, and
• the end date you enter for calculation.

Here’s a compact sensitivity table using the baseline principal and 8% rate:

Related reading

• Interest rule lens: Maine — The rule in plain language and why it matters
• Common interest mistakes in Rhode Island — Common errors and how to avoid them
• Worked example: interest in Maine — Worked example with real statute citations