US · guidance
BOP Program Statement 8532.08 § 7
PROMPT PAYMENT. Prompt payment is described synonymously
with timely payments in 5 CFR Part 1315. Timely payments are
defined as:
# payments not made late (after the due date or discount
date) and
# payments not made early (more than seven days before
the due date).
All FPI Business Offices must adhere to guidelines established in
5 CFR Part 1315 when making payments. The guidelines specify:
# the type of documents required for payment to vendors,
# calculation of due dates,
# interest penalties,
# rebates, and
# taking discounts.
Parameters established within FPI’s automated financial
management system used by all FPI locations incorporate these
guidelines.
a. Basic Payment Documents. In accordance with the prompt
payment guidelines, the following basic documentation must
support all payments FPI makes:
(1) “original” vendor invoice - document from a vendor
requesting payment for goods and/or services,
(2) receiving report or services received stamp -
certification that goods and/or services were received, and;
(3) purchase order - certified procurement document
authorizing the purchase of supplies and/or services.
The payment voucher is assembled after receipt of all basic
documentation. In addition, the applicable staff member must
sign the receiving report (if applicable) and purchase order
until notified by management of electronic signature authority.
b. Administrative Changes. The approving official may adjust
the invoice amount when it exceeds the price quoted on the
contract. However, this deduction cannot exceed $100 and the
vendor must be notified via a debit memorandum, when the payment
is made.
If the invoice amount exceeds $100 and can not be substantiated
the purchase order must be amended prior to payment. If not, the
PS 8532.08
3/15/2002
Page 10
invoice is improper and must be returned promptly to the vendor.
In addition, adjustments may not be made for unaccounted line
item freight charges and credit card settlements.
The sub-certifier must initial all administrative changes to
the invoice amount indicating review and approval of the
deduction.
c. Due Dates. In accordance with the prompt payment
guidelines the payment due date is 30 days from the latter of:
(1) the date the invoice is received, or
(2) the date goods and/or services are received and
accepted, unless otherwise specified in the contract.
d. Discounts. Discounts reduce costs associated with the
purchasing goods or services. A Contracting Officer may
negotiate a discount with the vendor or the vendor may offer a
discount for payment within a specified time frame (i.e. 2%,
net 10). However, discounts may only be taken if:
(1) the vendor offers the discount on the invoice or it is
stated in the contract,
(2) it is economically justified, and
(3) after acceptance has occurred.
The Department of Treasury developed and published a formula in
the Treasury Financial Manual, 1 TFM 8040.30, which must be used
to determine if a discount should be taken. The results of this
calculation is compared with the Current Value of Funds Rate
(CVFR). Therefore, discounts can be taken only if the discount
terms used in the formula result in an effective annual interest
rate equal to or greater than the CVFR. The published formula to
use to calculate discounts is:
Conversion Formula
Discount % X 360 (Always) = Effective
100% - Discount % Number of days - Number of days Annual
in Payment Left in Discount Discount
Period Period Rate
Example: Date Invoice Received: May 1
Date Goods Received: May 5 (4 days after invoice)
Invoice Discount Terms: 2%/10, net 30
CVFR: 5%
PS 8532.08
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Page 11
.02 X 360 = .306 or 31%
1.00 - .02 30 - (10-4)
*Note: The agency had 10 days to take the discount;
four days has elapsed between receipt of the
invoice and goods. Therefore, the difference
between these dates is used in the formula.
In this scenario the effective annual discount rate (31%)
exceeds the CVFR (5%). Therefore the discount should be taken
and the payment made accordingly.
The Business Manager and FMB Accounts Payable Supervisor or
designee must ensure discounts are taken appropriately for
discounts vendors offer. The discount period starts the day
after the date the vendor placed on the invoice or the “if paid
by date.” If the vendor fails to note a date on the invoice, the
date received and date stamped by the payment office are to be
used. The payment will be made as close to the discount date as
possible, but not later than the discount date.
If a Contracting Officer negotiates a discount, the Material
Management Branch (MMB) will enter the discount terms into the
integrated system. However, if the discount is offered on the
invoice, the Data Entry Operator (DEO) will enter the discount’s
terms when the invoice is entered into the integrated payment
system.
Under no circumstance should a discount be taken after the
discount period has ended. However, if a discount is taken after
the discount period has ended and the discount is not repaid
prior to the payment due date, interest penalties will accrue on
the unpaid amount.
e. Credit Card Rebates. Payments for credit card purchases
under $2,500 may be made without documentation that items have
been received. However, due to system configuration, locations
must enter a receiving report for processing payment(s) for
credit card purchases. In addition, the payment cannot be made
more than 30 days after receiving a proper invoice.
Payments for invoices over $2,500 must be paid 30 days after
receiving a proper invoice or date specified in the contract,
unless a rebate is offered for payment in full prior to
verification that goods and/or services have been received.
PS 8532.08
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Page 12
If a rebate is offered for the early payment of credit card
purchases exceeding $2,500, the Business Manager, Accountant, or
designee must compute a cost analysis to determine if the early
payment would benefit the government. The cost analysis would
require a simple computation using the CVFR, and the interest
rate the government would have earned had the payment not been
made early. The CVFR is published annually in the Federal
Register and is disseminated to field locations by FMB. The
computation’s result is compared to the daily basis points the
credit card issuer offered.
The following formula published in 5 CFR Part 1315 must be used
to calculate the basis for the government.
Formula: CVFR/360*100 = Basis Points
Example: Daily basis offered by card holder - 1.5
CVFR - 5%
Calculation: 5/360*100 = 1.4 (rounded)
Results: The payment should be made as soon as
possible since 1.5 is greater than 1.4.
However, if the rates were reversed the
payment would be made on the prompt
payment date.
If the basis points the card issuer offered is greater than the
results obtained from the computation, savings to the government
are maximized and payment should be made at the earliest possible
date. However, if the basis points the card issuer offered is
less than the results obtained from the computation, the
government will minimize costs by paying on the prompt payment
due date or the date specified in the contract.
f. Late Payment Interest Penalties. In accordance with
provisions established in 5 CFR Part 1315, all payments not made
by the payment due date are subject to assessment of an interest
penalty, including vouchers with discounts. The temporary
unavailability of funds does not relieve the obligation to pay
late payment interest penalties or additional penalties.
Late payment interest penalties will be paid regardless whether
the vendor requests them. Any adjustments to the amount due
because of an erroneous interest calculations can be made up to
one year.
PS 8532.08
3/15/2002
Page 13
The integrated payment system will age all payables depending
on the due date established in the system. The system will
calculate the amount of interest due for payments not made prior
to the 31 day and will generate an arrears letter.st
g. Interest Calculation. Interest is calculated and is
accrued daily from the day after the payment due date until the
payment is made. The interest is calculated on a 30 day basis
for any unpaid balance. Subsequent interest penalties will
accrue and will be added to the principal and interest penalties
until paid.
The prevailing interest rate in effect on the day after the due
date is to be used in calculating interest and will be based on a
360 day year. This rate is published semi-annually (January and
June) of each year and will be updated in the integrated payment
system by the Financial Manager or designee.
The following calculations are to be used to compute late
payment interest penalties:
Calculation:
Step one - Multiply the Dollar amount owed to vendor by the
applicable interest rate = X
Step two - Divide X by 360 (always) = Y
Step three - Multiply Y by the number days payment is late =
interest penalty
Initial Scenario:
Invoice amount: $10,325
Applicable interest rate: 8.125%
Number of days late: 14 days
Example 1 - initial interest calculation:
Step one - 10,325 * 8.125% = 838.91
Step two - 838.91 / 360 = 2.33
Step three - 2.33 * 14 = 32.62 (Interest Payable)
Required Payment: $10,357.62
Example 2 - 1 30 days principle and interest unpaid:st
Step one - 10,357.62 * 8.125 = 841.56
Step two - 841.56 / 360 = 2.34
Step three - 2.34 * 30 = 70.20 (Interest Payable)
PS 8532.08
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Required Payment: $10,427.82
Example 3 - 1 30 days paid principle only:st
Step one - 32.62 * 8.125 = 2.65
Step two - 2.65 / 360 = .007
Step three - .007 or * 30 = .22 (Interest Payable)
Payment Required: $32.84
In addition, if a discount is taken after the discount date
interest will accrue beginning on the day after the specified
discount date on the amount of the discount taken until paid.
Scenario
Invoice Amount: $10,000
Discount Amount: $1,000
Discount Period: 1 - 10 May
Payment Date: 25 May
Amount Paid: $9,000
Applicable Interest Rate: 8.125%
Number of days after disc: 15 days
Example 4 - discount taken after discount date:
Step one - 1,000 * 8.125 = 81.25
Step two - 81.25 / 360 = .23
Step three - .23 * 15 = 3.45 (Interest Payable)
h. Discontinuance of Accrual of Interest Penalties. Interest
penalties under prompt payment guidelines will not continue to
accrue:
T after the date a claim has been filed for penalties
under the Contract Disputes Act of 1978 or
T for more than one year
i. Interest Penalties Not Due. Interest penalties under the
prompt payment guidelines will not be paid if:
T the interest penalty is less than one dollar;
T the payment is delayed because of a dispute about the
payment amount or issues about contract terms;
T it is an advance payment; or
T the bank fails to credit a vendor’s account by the due
date.
PS 8532.08
3/15/2002
Page 15
j. Additional Penalties for Late Payments. FPI is required to
pay an additional penalty if the original late payment penalty
that is owed to a vendor has not been paid within 10 days after
the principal.
However, the vendor must request the additional penalty in
writing via mail, facsimile, or electronic mail. The Business
Office must receive the request no more than 40 days after the
payment date. In addition, the written request must include:
T request for payment of overdue late payment interest
penalty and additional penalty;
T a copy of the invoice on which the late payment
interest was due but not paid and a statement
indicating the date the principal was received; and
T an invoice in the amount of the request (an invoice is
required due to system configuration).
The additional penalty must equal one hundred percent of the
original late payment interest penalty (i.e. if the late payment
interest penalty was $35, the additional penalty would be $35).
However, the amount of the additional penalty may never be less
than $25 nor more than $5,000.
Upon receiving a request from a vendor for interest and
additional penalties, the Business Manager or designee must
prepare a voucher including a copy of:
T the original payment voucher,
T vendors request,
T invoice, and
T any pertinent back up documentation.
k. Utility Payments. Utility payments to include telephone
services at all FPI locations are subject to the Prompt Payment
Act’s provisions. If a rate for late payment is established by
local authorities (i.e. tariff), then this rate must be used.
However, if a rate has not been established, this PS’ provisions
will apply. In addition, the Prompt Payment Act’s provisions
will be referenced throughout this PS as it pertains to the
applicable subject matter.
History
PS 8532.08 dated 2002-03-15
Provenance
- Source
- bop.gov
- Retrieved
- 2026-09-20
- Edition
- bop-ps-2026-09-20
- Content hash
b2af7facc8136e9f75518c57d63d78966244f66c90bf19a0c2d90e25c7e45540
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