In the 1000 series (Reserves Deposited With Lender) of the HUD-1 Settlement Statement, amounts are calculated to be held by the lender for future payment of taxes, insurance and other items. The last line in the section is an accounting adjustment based on the difference between line item and aggregate accounting. It seems that there is a small difference between the results if the items are separately calculated rather than as a group. This adjustment will usually be a negative number. Here’s the language from the HUD document setting forth the calculation:

“(d) Methods of escrow account analysis. Paragraph (c) of this section prescribes acceptable accounting methods. The following sets forth the steps servicers shall use to determine whether their use of an acceptable accounting method conforms with the limitations in Sec. 3500.17(c)(1). The steps set forth in this section derive maximum limits. Servicers may use accounting procedures that result in lower target balances. In particular, servicers may use a cushion less than the permissible cushion or no cushion at all. This section does not require the use of a cushion.
(1) Aggregate analysis. (i) When a servicer uses aggregate analysis in conducting the escrow account analysis, the target balances may not exceed the balances computed according to the following arithmetic operations:
(A) The servicer first projects a trial balance for the account as a whole over the next computation year (a trial running balance). In doing so the servicer assumes that it will make estimated disbursements on or before the earlier of the deadline to take advantage of discounts, if available, or the deadline to avoid a penalty. The servicer does not use pre-accrual on these disbursement dates. The servicer also assumes that the borrower will make monthly payments equal to one-twelfth of the estimated total annual escrow account disbursements.
(B) The servicer then examines the monthly trial balances and adds to the first monthly balance an amount just sufficient to bring the lowest monthly trial balance to zero, and adjusts all other monthly balances accordingly.
(C) The servicer then adds to the monthly balances the permissible cushion. The cushion is two months of the borrower’s escrow payments to the servicer or a lesser amount specified by State law or the mortgage document (net of any increases or decreases because of prior year shortages or surpluses, respectively).
(ii) Lowest monthly balance. Under aggregate analysis, the lowest monthly target balance for the account shall be less than or equal to one-sixth of the estimated total annual escrow account disbursements or a lesser amount specified by State law or the mortgage document. The target balances that the servicer derives using these steps yield the maximum limit for the escrow account. Appendix E to this part illustrates these steps.
(2) Single-item or other non-aggregate analysis method. (i) When a servicer uses single-item analysis or any hybrid accounting method in conducting an escrow account analysis during the phase-in period, the target balances may not exceed the balances computed according to the following arithmetic operations:
(A) The servicer first projects a trial balance for each item over the next computation year (a trial running balance). In doing so the servicer assumes that it will make estimated disbursements on or before the earlier of the deadline to take advantage of discounts, if available, or the deadline to avoid a penalty. The servicer does not use pre-accrual on these disbursement dates. The servicer also assumes that the borrower will make periodic payments equal to one-twelfth of the estimated total annual escrow account disbursements.
(B) The servicer then examines the monthly trial balance for each escrow account item and adds to the first monthly balance for each separate item an amount just sufficient to bring the lowest monthly trial balance for that item to zero, and then adjusts all other monthly balances accordingly.
(C) The servicer then adds the permissible cushion, if any, to the monthly balance for the separate escrow account item. The permissible cushion is two months of escrow payments for the escrow account item (net of any increases or decreases because of prior year shortages or surpluses, respectively) or a lesser amount specified by State law or the mortgage document.
(D) The servicer then examines the balances for each item to make certain that the lowest monthly balance for that item is less than or equal to one-sixth of the estimated total annual escrow account disbursements for that item or a lesser amount specified by State law or the mortgage document.
(ii) In performing an escrow account analysis using single-item analysis, servicers may account for each escrow account item separately, but servicers shall not further divide accounts into sub-accounts, even if the payee of a disbursement requires installment payments. The target balances that the servicer derives using these steps yield the maximum limit for the escrow account. Appendix F to this part illustrates these steps.”