Finance category
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Insurance Proration Calculator
When a property sells mid-policy-year, the prepaid homeowner insurance premium has to be split. This calculator computes the refund the seller is owed — whether by cancellation or buyer assumption.
Seller gets back
$791
refund or closing credit
Days remaining on policy
165
Per-day premium
$4.79
Handling
Seller cancels & gets refund
How the math works
Homeowner insurance is typically prepaid for a full year. When ownership changes, the seller either cancels and gets a refund from the carrier, or the buyer assumes the policy and credits the seller at closing for the unused portion.
Most transactions cancel because the new owner needs a policy in their own name as a lender-required condition of closing. The title company handles the credit math via a pro-rate adjustment on the Closing Disclosure.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Insurance Proration Calculator is built to give a quick, browser-based estimate for insurance proration. When a property sells mid-policy-year, the prepaid homeowner insurance premium has to be split. This calculator computes the refund the seller is owed — whether by cancellation or buyer assumption. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the insurance proration result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this insurance proration estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter the annual premium paid at the start of the policy year.
- Enter the policy start month.
- Enter the closing month and day.
- Pick whether the seller cancels (refund from carrier) or the buyer assumes (credit at closing).
Frequently Asked Questions
Does the buyer assume insurance in most closings?
No — rarely. The lender requires a new policy in the buyer's name. The seller cancels the old policy and the carrier refunds the unused portion (pro rata or short-rate depending on policy terms).
Pro rata vs short-rate refund?
Pro rata refunds the exact unused portion. Short-rate applies a cancellation penalty (~10%). Most modern policies are pro rata but check your declarations page before assuming the refund amount.
What about the mortgage escrow?
The escrow holds enough to pay the NEXT annual premium, not the current one. The current prepaid year is separate. The escrow balance is returned separately after payoff — see the Escrow Refund Calculator.
Does this apply to condo insurance (HO-6)?
Yes — condo and townhome HO-6 policies prorate the same way. The HOA master policy is handled by the association and not included in owner-level proration.
Related Calculators
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