Zero tolerance
These generally cannot increase from your Loan Estimate at all unless a valid changed circumstance was disclosed to you in a revised Loan Estimate.
Typical fees: Origination charges, points you already locked, the lender's underwriting and processing fees, fees for services you were not allowed to shop for where the lender chose the provider, and transfer taxes.
If it moved: Any increase without a documented changed circumstance is normally cured by the lender — commonly as a lender credit on Page 2 or 3. Ask for it in writing.
10% cumulative tolerance
This group is measured as a bucket, not line by line. The total of the group can typically rise up to 10% above the Loan Estimate total.
Typical fees: Recording fees, and third-party services you were allowed to shop for where you chose a provider from the lender's written list.
If it moved: Add the group up on both documents. One line can jump if another falls, but if the bucket total is more than 10% higher, ask the lender to explain or cure the excess.
No tolerance limit
These legitimately move because they are market-driven, date-driven, or your own choice — they are not lender pricing.
Typical fees: Prepaid interest (per-diem, tied to your closing date), homeowners insurance premiums, property taxes and escrow deposits, and third-party services you shopped for outside the lender's provider list.
If it moved: Changes here are usually normal. Still confirm the math: check the number of per-diem days, the insurance premium against your policy, and the escrow months against Page 2's escrow table.