XML 10 R3.htm IDEA: XBRL DOCUMENT v3.7.0.1
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName T. Rowe Price Index Trust, Inc.
Prospectus Date rr_ProspectusDate May 01, 2017
Supplement [Text Block] trpiti_SupplementTextBlock T. Rowe Price Equity Index 500 Fund

Supplement to Prospectus Dated May 1, 2017

The fund’s Board of Directors approved lowering the fund’s management fee from 0.10% to 0.06%, and lowering the current limitation in the Investor Class’ total expense ratio from 0.25% to 0.21%, effective August 1, 2017. On pages 1-2, the fee table and expense example are revised as follows, effective August 1, 2017, to reflect the reduction of the management fee and Investor Class’ expense limitation:

Fees and Expenses of the Fund

     
 
Investor

Class
I

Class
Shareholder fees (fees paid directly from your investment)
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less)
0.50
%
0.50%
Maximum account fee
$20
a
—
Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)
Management fees
0.06
%b
0.06
%b
Distribution and service (12b-1) fees
—
 
—
 
Other expenses
0.17
 
—
 
Total annual fund operating expenses
0.23
b
0.06
b
Fee waiver/expense reimbursement
(0.02
)b,c
—
Total annual fund operating expenses after fee waiver/expense reimbursement
0.21
b,c
0.06
b

a Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

b Restated to reflect current fees.

c T. Rowe Price Associates, Inc., has agreed (through April 30, 2020) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.21%. The agreement may be terminated at any time beyond April 30, 2020, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and previous limitations of 0.25% and 0.30%) are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the class’ expense ratio is below 0.21%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.21% (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses).

Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 
1 year
3 years
5 years
10 years
Investor Class
$22
$68
$124
$287
I Class
6
19
34
77
T. Rowe Price Equity Index 500 Fund  
Risk/Return: rr_RiskReturnAbstract  
Supplement [Text Block] trpiti_SupplementTextBlock T. Rowe Price Equity Index 500 Fund

Supplement to Prospectus Dated May 1, 2017

The fund’s Board of Directors approved lowering the fund’s management fee from 0.10% to 0.06%, and lowering the current limitation in the Investor Class’ total expense ratio from 0.25% to 0.21%, effective August 1, 2017. On pages 1-2, the fee table and expense example are revised as follows, effective August 1, 2017, to reflect the reduction of the management fee and Investor Class’ expense limitation:

Fees and Expenses of the Fund

     
 
Investor

Class
I

Class
Shareholder fees (fees paid directly from your investment)
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less)
0.50
%
0.50%
Maximum account fee
$20
a
—
Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)
Management fees
0.06
%b
0.06
%b
Distribution and service (12b-1) fees
—
 
—
 
Other expenses
0.17
 
—
 
Total annual fund operating expenses
0.23
b
0.06
b
Fee waiver/expense reimbursement
(0.02
)b,c
—
Total annual fund operating expenses after fee waiver/expense reimbursement
0.21
b,c
0.06
b

a Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

b Restated to reflect current fees.

c T. Rowe Price Associates, Inc., has agreed (through April 30, 2020) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.21%. The agreement may be terminated at any time beyond April 30, 2020, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and previous limitations of 0.25% and 0.30%) are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the class’ expense ratio is below 0.21%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.21% (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses).

Example This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 
1 year
3 years
5 years
10 years
Investor Class
$22
$68
$124
$287
I Class
6
19
34
77
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Restated to reflect current fees.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that an expense limitation currently in place is not renewed; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
T. Rowe Price Equity Index 500 Fund | Investor Class  
Risk/Return: rr_RiskReturnAbstract  
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less) rr_RedemptionFeeOverRedemption 0.50%
Maximum account fee rr_MaximumAccountFee $ 20 [1]
Management fees rr_ManagementFeesOverAssets 0.06% [2]
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets
Other expenses rr_OtherExpensesOverAssets 0.17%
Total annual fund operating expenses rr_ExpensesOverAssets 0.23% [2]
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [2],[3]
Total annual fund operating expenses after fee waiver/expense reimbursement rr_NetExpensesOverAssets 0.21% [2],[3]
1 year rr_ExpenseExampleYear01 $ 22
3 years rr_ExpenseExampleYear03 68
5 years rr_ExpenseExampleYear05 124
10 years rr_ExpenseExampleYear10 $ 287
T. Rowe Price Equity Index 500 Fund | I Class  
Risk/Return: rr_RiskReturnAbstract  
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less) rr_RedemptionFeeOverRedemption 0.50%
Maximum account fee rr_MaximumAccountFee
Management fees rr_ManagementFeesOverAssets 0.06% [2]
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets
Other expenses rr_OtherExpensesOverAssets
Total annual fund operating expenses rr_ExpensesOverAssets 0.06% [2]
Fee waiver/expense reimbursement rr_FeeWaiverOrReimbursementOverAssets
Total annual fund operating expenses after fee waiver/expense reimbursement rr_NetExpensesOverAssets 0.06% [2]
1 year rr_ExpenseExampleYear01 $ 6
3 years rr_ExpenseExampleYear03 19
5 years rr_ExpenseExampleYear05 34
10 years rr_ExpenseExampleYear10 $ 77
[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.
[2] Restated to reflect current fees.
[3] T. Rowe Price Associates, Inc., has agreed (through April 30, 2020) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.21%. The agreement may be terminated at any time beyond April 30, 2020, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and previous limitations of 0.25% and 0.30%) are subject to reimbursement to T. Rowe Price Associates, Inc., by the fund whenever the class’ expense ratio is below 0.21%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 0.21% (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses).