Free Writing Prospectus filed pursuant to Rule 433 dated July 29, 2025

Registration No. 333-282565

The Bank of Nova Scotia

Autocallable Contingent Coupon Trigger Notes

Linked to the Common Stock of NVIDIA Corporation Due September 24, 2026

OVERVIEW

If the closing price of the common stock of NVIDIA Corporation (the reference asset) on any observation date is less than 65.00% of the initial price, you will not receive a contingent coupon on the corresponding coupon payment date. The amount that you will be paid on your notes is based on the performance of the reference asset.

The notes will mature on the maturity date, unless they are automatically called on any observation date, commencing in February 2026 to and including August 2026. Your notes will be automatically called if the closing price of the reference asset on any such observation date is equal to or greater than the initial price. If your notes are automatically called, you will receive a payment for each $1,000 principal amount of your notes on the corresponding payment date equal to $1,000 plus the contingent coupon with respect to such observation date (as described below).

Observation dates are expected to be the 19th calendar day of each month (provided that the observation date for September 2026 is expected to be September 21, 2026, which is also the final valuation date), commencing in September 2025 and ending in September 2026. If, on any observation date, the closing price of the reference asset is equal to or greater than 65.00% of the initial price, you will receive on the corresponding coupon payment date a contingent coupon of $10.417 for each $1,000 principal amount of your notes (equal to 1.0417% monthly, or the potential for up to approximately 12.50% per annum).

If your notes are not automatically called, the return on your notes, in addition to any contingent coupon otherwise due, will be based on the final price relative to the initial price.

You should read the accompanying preliminary pricing supplement dated July 29, 2025, which we refer to herein as the accompanying preliminary pricing supplement, to better understand the terms and risks of your investment.

KEY TERMS

This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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Additional INFORMATION ABOUT THE notes

Below are the links to the accompanying preliminary pricing supplement, product supplement, prospectus supplement and prospectus for the notes. You should read and understand the preliminary pricings supplement including the documents incorporated by reference therein prior to investing in the securities.

The issuer has filed a registration statement (including a prospectus as supplemented by a prospectus supplement, product supplement and the preliminary pricing supplement) with the Securities and Exchange Commission (the “SEC”) for the offering to which this communication relates. Before you invest, you should read the accompanying prospectus in that registration statement and the other documents the issuer has filed with the SEC, including the accompanying preliminary pricing supplement and the accompanying prospectus supplement and product supplement, for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling (212) 225-5678. Our Central Index Key, or CIK, on the SEC web site is 0000009631.

Preliminary Pricing Supplement dated July 29, 2025:

http://www.sec.gov/Archives/edgar/data/9631/000183988225040953/bns_424b2-22505.htm

Product Supplement (Market-Linked Notes, Series A) dated November 8, 2024:

http://www.sec.gov/Archives/edgar/data/9631/000183988224038316/bns_424b2-21309.htm

Prospectus Supplement dated November 8, 2024:

http://www.sec.gov/Archives/edgar/data/9631/000183988224038303/bns_424b3-21311.htm

Prospectus dated November 8, 2024:

http://www.sec.gov/Archives/edgar/data/9631/000119312524253771/d875135d424b3.htm

This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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Hypothetical contingent COUPOn PAyments

The examples below show hypothetical performance of the reference asset and the effect of the automatic call feature, as well as the hypothetical contingent coupons, if any, that we would pay on each coupon payment date with respect to each $1,000 principal amount of the notes if the closing price of the reference asset is equal to or greater than the coupon barrier on the applicable observation date. These below scenarios reflect only the payment of any hypothetical contingent coupons with respect to each observation date and the effect of the automatic call feature, and do not reflect the payment at maturity if the notes are not automatically called.

Scenario 1

* Each of these hypothetical observation dates is also a hypothetical call observation date.

** The hypothetical closing price of the reference asset on the hypothetical observation date is equal to or greater than the coupon barrier.

In this scenario, the closing price of the reference asset increases and decreases by varying amounts on each hypothetical observation date. Because the closing price of the reference asset is less than the initial price on each hypothetical call observation date, the notes will not be automatically called. Because the closing price of the reference asset on the third and sixth hypothetical observation dates is equal to or greater than the coupon barrier, you would receive the contingent coupon with respect to each such hypothetical observation date. Because the closing price of the reference asset on all of the other hypothetical observation dates is less than the coupon barrier, no other contingent coupons would be paid, including at maturity. The total of the hypothetical contingent coupons you would receive in this scenario is $20.834. Because the final price is less than the trigger price, BNS will deliver the share delivery amount at maturity (with cash paid in lieu of any fractional share, equal to the product of such fractional share and the final price). See “Hypothetical Payments at Maturity” below.

This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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Scenario 2

* Each of these hypothetical observation dates is also a hypothetical call observation date.

In this scenario, the closing price of the reference asset increases and decreases by varying amounts on each hypothetical observation date. Because the closing price of the reference asset is less than the initial price on each hypothetical call observation date, the notes will not be automatically called. Because the closing price of the reference asset on each hypothetical observation date is less than the coupon barrier, you will not receive any contingent coupons during the term of the notes. Accordingly, you would not receive a positive return on the notes. Conversely, because the final price is less than the trigger price, BNS will deliver the share delivery amount at maturity (with cash paid in lieu of any fractional share, equal to the product of such fractional share and the final price). See “Hypothetical Payments at Maturity” below.

Scenario 3

* Each of these hypothetical observation dates is also a hypothetical call observation date.

In this scenario, on each of the hypothetical observation dates prior to the hypothetical sixth observation date the closing price of the reference asset is less than the coupon barrier and, accordingly, no contingent coupon is due with respect to any such hypothetical observation date. On the sixth hypothetical observation date, which is also the first hypothetical call observation date, the closing price of the reference asset is equal to or greater than the initial price and the notes are therefore automatically called. On the corresponding call payment date, in addition to the contingent coupon of $10.417, you will receive an amount in cash equal to $1,000 for each $1,000 principal amount of your notes. In this scenario, your total return on the notes would be 1.0417%.

This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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Hypothetical PAYMENT AT MATURITY

* Does not include the final contingent coupon, if any

** Represents the value of the share delivery amount, calculated as of the final valuation date. In the event that the final price is less than the trigger price, any decline in the price of the reference asset from the final valuation date to the maturity date will cause your return on the notes to be less than the return you would have received had we instead paid you an amount in cash equal to the value of the share delivery amount, calculated as of the final valuation date.

This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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This document does not provide all of the information that an investor should consider prior to making an investment decision. You should not invest in the notes without reading the accompanying preliminary pricing supplement and related documents for a more detailed description of the reference asset, the terms of the notes and risks related to investing in the notes.

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