Worked example: Alimony Child Support in New Hampshire

Example inputs

Run this scenario in DocketMath using the Alimony Child Support calculator.

Below is a worked example showing how DocketMath’s alimony-child-support calculator can help you model potential outcomes for New Hampshire (US-NH) support issues. This is a computational walkthrough—not legal advice.

If you want to run the same kind of model yourself, start here: /tools/alimony-child-support.

Scenario (assumed numbers for demonstration)

We’ll use a concrete fact pattern so you can see how the math flows:

• Filing / timing context date: March 15, 2025
• Payor (obligor) gross income: $7,000/month
• Recipient (obligee) gross income: $2,500/month
• One child involved: age 9
• Custody assumption for example: Primary placement with the recipient (payor pays support)
• Monthly alimony amount to model: $600/month
• Monthly child support baseline used by the model: $750/month
• Additional allowable adjustments: none applied in this example
• Prior support arrears period to consider (for limitations context): from March 16, 2022 forward

DocketMath inputs you’d enter

Depending on how your session is configured, DocketMath typically asks for inputs like these (field names may vary by UI):

• Jurisdiction: New Hampshire (US-NH)
• Payor monthly income
• Recipient monthly income
• Number of children
• Child ages
• Requested alimony amount (or an alimony modeling parameter, depending on the tool UI)
• Base child support amount (or the inputs used to compute it within the calculator)
• Adjustment flags (if the tool supports additional adjustments)
• Effective date / timing inputs (if the tool includes arrears period modeling)

Limitations timing concept (what drives arrears modeling)

When a calculator models “how far back” unpaid amounts might be included, it typically relies on a statute of limitations framework. For New Hampshire, your jurisdiction data provides:

• General SOL period: 3 years
• General statute: RSA 508:4
• Source: https://www.thelaw.com/law/new-hampshire-statute-of-limitations-civil-actions.391/?utm_source=openai

Also, your brief notes that no claim-type-specific sub-rule was found, so this example treats the 3-year general/default period as the baseline.

Example run

Run the Alimony Child Support 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: Limitations timing (New Hampshire civil actions)

Using the provided jurisdiction data:

• General SOL: 3 years
• Authority: RSA 508:4
• No claim-type-specific rule found: so we apply the 3-year general/default period as the baseline for this timing example.

For the scenario, if the relevant timing point is March 15, 2025, then a simple “back 3 years” lookback window starts around March 16, 2022.

That yields an arrears modeling period of approximately:

• ~36 months (illustrative month-counting)

What the limitation affects in the model

In practice, limitations modeling usually affects:

• How many months of unpaid support are included in an arrears estimate
• The maximum lookback window the calculator applies (which can limit older months)

Step 2: Monthly support math (alimony + child support)

Using the example inputs:

DocketMath may present outputs as:

• Estimated monthly obligations
• Estimated accumulated / arrears total over the selected window
• Category breakdown (alimony vs child support)
• Grand total (depending on the tool’s layout)

In this demonstration:

• Estimated arrears total (~36 months): $48,600
• Alimony portion: $21,600
• Child support portion: $27,000

Pitfall to watch: if you change the arrears lookback start date (or the tool’s “effective/timing” settings), the included number of months changes, and the total can move a lot—even if monthly amounts don’t change.

Step 3: Present results in the calculator’s output style

A DocketMath-style output for this kind of run typically communicates the key totals you’d expect:

• Monthly alimony and/or combined support metrics based on your inputs
• Arrears total for the periods the tool includes
• Breakdown by category (where applicable)

For this scenario, the illustrative totals over ~36 months are:

• Combined arrears total: $48,600
• Alimony component: $21,600
• Child support component: $27,000

Sensitivity check

Now let’s test how sensitive the result is to two modeling choices that commonly affect support/arrears estimates: (1) the arrears lookback window and (2) the alimony amount.

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) Change the arrears lookback window: 36 vs. 24 months

Because this example uses the 3-year general/default SOL under RSA 508:4, the “full” run uses about 36 months.

If you instead modeled only 24 months (e.g., the tool applies a shorter included window based on different timing assumptions), then the totals would be:

Change from the 36-month run:

• $48,600 − $32,400 = $16,200 decrease

2) Change monthly obligations: adjust alimony by ±$150

Here’s a simple sensitivity check on alimony alone, holding child support at $750/month and keeping the window at 36 months.

Scenario A: Alimony increases to $750/month

• Alimony: $750 × 36 = $27,000
• Child support: $750 × 36 = $27,000
• Combined: $54,000

Scenario B: Alimony decreases to $450/month

• Alimony: $450 × 36 = $16,200
• Child support: $750 × 36 = $27,000
• Combined: $43,200

Difference between A and B:

• $54,000 − $43,200 = $10,800

3) Quick “multiplier” intuition (sanity-check)

With the numbers used here:

• Total per month = alimony + child support
• $600 + $750 = $1,350/month
• Total over N months ≈ $1,350 × N

So:

• 36 months → $1,350 × 36 = $48,600
• 24 months → $1,350 × 24 = $32,400

This is a practical way to check whether you typed the right monthly amounts and whether the tool is including the number of months you intended.

Reminder: the calculator reflects the inputs and timing choices you provide. If your real-world situation includes changing obligations over time (temporary orders, step-changes, or modifications), it’s often more accurate to model those periods separately than to use one flat monthly amount for the entire window.

Related reading

• Alimony & Child Support Estimator Guide for Alabama
• Alimony & Child Support Estimator Guide for Arizona
• Alimony & Child Support Estimator Guide for Colorado