PRICING SUPPLEMENT

Inter-American Development Bank

Global Debt Program

Series No: 667

Tranche No.: 6

GBP 500,000,000 1.375 percent Notes due December 15, 2024 (the "Notes") as from January 17, 2020 to be consolidated and form a single series with the Bank's GBP 250,000,000 1.375 percent Notes due December 15, 2024 issued on September 7, 2018 (the "Series 667 Tranche 1 Notes"), the Bank's GBP 100,000,000 1.375 percent Notes due December 15, 2024 issued on March 12, 2019 (the "Series 667 Tranche 2 Notes"), the Bank's GBP 150,000,000 1.375 percent Notes due December 15, 2024 issued on April 3, 2019 (the "Series 667 Tranche 3 Notes"), the Bank's GBP 225,000,000 1.375 percent Notes due December 15, 2024 issued on September 30, 2019 (the "Series 667 Tranche 4 Notes") and the Bank's GBP 100,000,000 1.375 percent Notes due December 15, 2024 issued on October 29, 2019 (the "Series 667 Tranche 5 Notes")

Issue Price: 102.178 percent plus 33 days' of accrued interest

Application has been made for the Notes to be admitted to the

Official List of the Financial Conduct Authority and

to trading on the London Stock Exchange plc's

Regulated Market

BofA Securities

NatWest Markets

Nomura

The date of this Pricing Supplement is January 14, 2020.

Terms used herein shall be deemed to be defined as such for the purposes of the Terms and Conditions (the "Conditions") set forth in the Prospectus dated January 8, 2001 (the "Prospectus") (which for the avoidance of doubt does not constitute a prospectus for the purposes of Part VI of the United Kingdom Financial Services and Markets Act 2000 or a base prospectus for the purposes of the Regulation (EU) 2017/1129).  This Pricing Supplement must be read in conjunction with the Prospectus.  This document is issued to give details of an issue by the Inter-American Development Bank (the "Bank") under its Global Debt Program and to provide information supplemental to the Prospectus.  Complete information in respect of the Bank and this offer of the Notes is only available on the basis of the combination of this Pricing Supplement and the Prospectus.

MiFID II product governance / Retail investors, professional investors and ECPs target market - See "General Information-Additional Information Regarding the Notes-Matters relating to MiFID II" below.

Terms and Conditions

The following items under this heading "Terms and Conditions" are the particular terms which relate to the issue the subject of this Pricing Supplement.  These are the only terms which form part of the form of Notes for such issue. 

General Information

Additional Information Regarding the Notes

1.         Matters relating to MiFID II

The Bank does not fall under the scope of application of the MiFID II regime.  Consequently, the Bank does not qualify as an "investment firm", "manufacturer" or "distributor" for the purposes of MiFID II.

MiFID II product governance / Retail investors, professional investors and ECPs target market - Solely for the purposes of the manufacturers' product approval process, the target market assessment in respect of the Notes has led to the conclusion that: (i) the target market for the Notes is eligible counterparties, professional clients and retail clients, each as defined in MiFID II; and (ii) all channels for distribution of the Notes are appropriate. Any person subsequently offering, selling or recommending the Notes (a "distributor") should take into consideration the manufacturers' target market assessment; however, a distributor subject to MiFID II is responsible for undertaking its own target market assessment in respect of the Notes (by either adopting or refining the manufacturers' target market assessment) and determining appropriate distribution channels.

For the purposes of this provision, the expression MiFID II means Directive 2014/65/EU, as amended.

2.         United States Federal Income Tax Matters

            The following supplements the discussion under the "Tax Matters" section of the Prospectus regarding the U.S. federal income tax treatment of the Notes, and is subject to the limitations and exceptions set forth therein.  Any tax disclosure in the Prospectus or this pricing supplement is of a general nature only, is not exhaustive of all possible tax considerations and is not intended to be, and should not be construed to be, legal, business or tax advice to any particular prospective investor.  Each prospective investor should consult its own tax advisor as to the particular tax consequences to it of the acquisition, ownership, and disposition of the Notes, including the effects of applicable U.S. federal, state, and local tax laws and non-U.S. tax laws and possible changes in tax laws.

Because the Notes are denominated and payable in British pound sterling, a United States holder of the Notes will generally be subject to special United States federal income tax rules governing foreign currency transactions, as described in the Prospectus in the last four paragraphs of "-Payments of Interest",  in "-Purchase, Sale and Retirement of the Notes" and in "-Exchange of Amounts in Other Than U.S. Dollars" under the "United States Holders" section. 

            A United States holder will generally be taxed on interest on the Notes as ordinary income at the time such holder receives the interest or when it accrues, depending on the holder's method of accounting for tax purposes.  However, the portion of the first interest payment on the Notes that represents a return of the 33 days of accrued interest that a United States holder paid as part of the Issue Price of the Notes ("Pre-Issuance Accrued Interest") will not be treated as an interest payment for United States federal income tax purposes, and will accordingly only be taxable to the extent that the U.S. dollar value of the Pre-Issuance Accrued Interest on the date of receipt differs from the U.S. dollar value of such amount on the Issue Date.  Any such difference should give rise to United States source foreign currency gain or loss. 

            Upon the sale or retirement of the Notes, a United States holder will generally recognize gain or loss equal to the difference, if any, between the U.S. dollar value of the amount realized by such holder, excluding any amounts attributable to accrued but unpaid interest (which will be treated as interest payments except to the extent that such amounts are a return of Pre-Issuance Accrued Interest), and such holder's tax basis in the Notes.  A United States holder's adjusted tax basis in the Notes generally will equal the U.S. dollar cost of the Notes to the United State holder, reduced, if such disposition occurs after the first interest payment, by an amount equal to the U.S. dollar value of the Pre-Issuance Accrued Interest on the Issue Date.  Such gain or loss will be capital gain or loss except to the extent attributable to changes in exchange rates.  Capital gain of individual taxpayers from the sale or retirement of the Notes will generally be treated as long-term capital gain or loss to the extent the United States holder has held the Notes for more than one year.  Long-term capital gain of individual taxpayers may be eligible for reduced rates of taxation.  The deductibility of capital loss is subject to significant limitations.

            Additionally, because the purchase price of the Notes exceeds the principal amount of the Notes, a United States holder may elect to treat the excess (after excluding the portion of the purchase price attributable to Pre-Issuance Accrued Interest) as amortizable bond premium.  A United States holder that makes this election would reduce the amount required to be included in such holder's income each year with respect to interest on the Notes by the amount of amortizable bond premium allocable to that year, based on the Note's yield to maturity.  Because the Notes are denominated in British pound sterling, a United States holder would compute such holder's amortizable bond premium in units of British pound sterling, and the United States holder's amortizable bond premium would reduce such holder's interest income in units of British pound sterling.  Gain or loss recognized that is attributable to changes in exchange rates between the time the United States holder's amortized bond premium offsets interest income and the time of the holder's acquisition of the Notes is generally taxable as ordinary income or loss.  If a United States holder makes an election to amortize bond premium, the election would apply to all debt instruments, other than debt instruments the interest on which is excludible from gross income, that the United States holder holds at the beginning of the first taxable year to which the election applies or that such holder thereafter acquires, and the United States holder may not revoke the election without the consent of the U.S. Internal Revenue Service ("IRS").

            Due to a change in law since the date of the Prospectus, the second paragraph of "-Payments of Interest" under the "United States Holders" section should be updated to read as follows: "Interest paid by the Bank on the Notes constitutes income from sources outside the United States and will generally be "passive" income for purposes of computing the foreign tax credit."

            Information with Respect to Foreign Financial Assets. Owners of "specified foreign financial assets" with an aggregate value in excess of U.S.$50,000 (and in some circumstances, a higher threshold) may be required to file an information report with respect to such assets with their tax returns.  "Specified foreign financial assets" may include financial accounts maintained by foreign financial institutions, as well as the following, but only if they are held for investment and not held in accounts maintained by financial institutions:  (i) stocks and securities issued by non-United States persons, (ii) financial instruments and contracts that have non-United States issuers or counterparties, and (iii) interests in foreign entities.  Holders are urged to consult their tax advisors regarding the application of this reporting requirement to their ownership of the Notes.

            Medicare Tax. A United States holder that is an individual or estate, or a trust that does not fall into a special class of trusts that is exempt from such tax, is subject to a 3.8% tax (the "Medicare tax") on the lesser of (1) the United States holder's "net investment income" (or "undistributed net investment income" in the case of an estate or trust) for the relevant taxable year and (2) the excess of the United States holder's modified adjusted gross income for the taxable year over a certain threshold (which in the case of individuals is between U.S.$125,000 and U.S.$250,000, depending on the individual's circumstances). A holder's net investment income will generally include its interest income and its net gains from the disposition of Notes, unless such interest income or net gains are derived in the ordinary course of the conduct of a trade or business (other than a trade or business that consists of certain passive or trading activities). United States holders that are individuals, estates or trusts are urged to consult their tax advisors regarding the applicability of the Medicare tax to their income and gains in respect of their investment in the Notes.

Treasury Regulations Requiring Disclosure of Reportable Transactions. Treasury regulations require United States taxpayers to report certain transactions that give rise to a loss in excess of certain thresholds (a "Reportable Transaction").  Under these regulations, because the Notes are denominated in a foreign currency, a United States holder (or a non-United States holder that holds the Notes in connection with a U.S. trade or business) that recognizes a loss with respect to the Notes that is characterized as an ordinary loss due to changes in currency exchange rates (under any of the rules discussed under the "Tax Matters" section of the Prospectus) would be required to report the loss on IRS Form 8886 (Reportable Transaction Statement) if the loss exceeds the thresholds set forth in the regulations.  For individuals and trusts, this loss threshold is U.S.$50,000 in any single taxable year.  For other types of taxpayers and other types of losses, the thresholds are higher.  Holders should consult with their tax advisors regarding any tax filing and reporting obligations that may apply in connection with acquiring, owning and disposing of Notes.

INTER-AMERICAN DEVELOPMENT BANK