-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 O0W3+EtMYRP7eej9gu7uwZaUX2qyo/bDk4HbAtEGYbQjO7CvuGuNt0xO2pF4TtRv
 6Aod6Eyz9dbt2wNNm4tmnw==

<SEC-DOCUMENT>0001413642-08-000001.txt : 20081212
<SEC-HEADER>0001413642-08-000001.hdr.sgml : 20081212
<ACCEPTANCE-DATETIME>20081212175900
ACCESSION NUMBER:		0001413642-08-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20081212
FILED AS OF DATE:		20081212
DATE AS OF CHANGE:		20081212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BAKALAR JEFFREY A
		CENTRAL INDEX KEY:			0001224530

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05410
		FILM NUMBER:		081247846

	MAIL ADDRESS:	
		STREET 1:		10845 E. VERBENA LN
		CITY:			SCOTTSDALE
		STATE:			AZ
		ZIP:			85255

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ING PRIME RATE TRUST
		CENTRAL INDEX KEY:			0000826020
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				956874587
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0228

	BUSINESS ADDRESS:	
		STREET 1:		ING PRIME RATE TRUST
		STREET 2:		7337 E. DOUBLETREE RANCH ROAD
		CITY:			SCOTTSDALE
		STATE:			AZ
		ZIP:			85258
		BUSINESS PHONE:		4804773000

	MAIL ADDRESS:	
		STREET 1:		ING PRIME RATE TRUST
		STREET 2:		7337 E. DOUBLETREE RANCH ROAD
		CITY:			SCOTTSDALE
		STATE:			AZ
		ZIP:			85258

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PILGRIM AMERICA PRIME RATE TRUST
		DATE OF NAME CHANGE:	19960518

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PILGRIM PRIME RATE TRUST/
		DATE OF NAME CHANGE:	19960518

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PILGRIM PRIME RATE TRUST
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-12-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000826020</issuerCik>
        <issuerName>ING PRIME RATE TRUST</issuerName>
        <issuerTradingSymbol>PPR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001224530</rptOwnerCik>
            <rptOwnerName>BAKALAR JEFFREY A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10845 E. VERBENA LN</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SCOTTSDALE</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85255</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Senior Vice-President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-12-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.8</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8565</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Jeffrey A Bakalar</signatureName>
        <signatureDate>2008-12-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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