- S&L
- S&P 500 Mini
- S&P no-load index fund
- S&P/Case-Shiller Home Price Indexes
- Safe harbor
- Safekeeping
- Salary reduction contribution
- Sale and leaseback
- Sale contract
- Sale leaseback
- Sales agreement
- Sales and purchase agreement - SPA
- Sallie Mae
- Same property rule
- Sample sale
- Sandwich lease
- SARSEP IRA
- SAT
- Satisfaction of a mortgage
- Satisfaction of debt
- Savings
- Savings account
- Savings and Loan Association
- Savings bank
- Savings incentive match plan for employees
- Schedule A
- Schedule D
- Scheduled recast
- Schedules
- Schematic designs
- Scholarship
- Schumer Box
- Second chance loan
- Second mortgage
- Second surgical opinion
- Second-chance auction scam
- Second-to-die insurance
- Secondary CD
- Secondary mortgage market
- Seconds
- Section 1031
- Section 1035 exchange
- Section 1245
- Section 1250
- Section 179 expense
- Secure option ARM
- Secured card
- Secured credit card
- Secured debt
- Secured loan
- Securities lending
- Security
- Security deposit
- Security freeze
- Security interest
- Security loan
- Self employed borrower
- Self-amortizing loan
- Self-amortizing mortgage
- Self-directed IRA
- Self-employed person
- Self-employment tax
- Seller broker
- Seller carry-back
- Seller financing
- Seller take-back
- Seller's agent
- Seller's market
- Semi-custom home
- Seminole quarterbacking
- Senior
- Senior debt
- Senior security
- SEP
- SEP IRA
- Separate return
- Series HH bond
- Serious delinquency
- Service charge
- Service contract
- Servicer
- Servicing
- Servicing strip
- Settle
- Settlement cost (HUD guide)
- Settlement sheet
- Settlement statement
- Severance pay
- Share appreciation mortgage
- Share certificate
- Shared equity partnership
- Shared-appreciation mortgage
- Shared-equity partnership
- Short hedge
- Short refinance
- Short sale
- Short tax year
- Short-term
- Short-term bond fund
- Short-term capital gain or loss
- Sight letter of credit
- Signature loan
- Silent second mortgage
- SIMPLE
- Simple interest
- Simple interest bi-weekly mortgage
- Simple interest loan
- SIMPLE IRA
- Simple-interest mortgage
- Simplified employee pension plan
- Single
- Single agency
- Single-payment loan
- Sinking fund/reserves
- Skimming
- Skip payment mortgage
- SLMA
- Smart cards
- SMI
- Smishing
- Snowball
- Social security number
- Soft inquiry
- Soft loan
- Spec home
- Special assessment
- Special finance
- Special forbearance
- Special purchase
- Specific-shares method
- Speculation home or spec home or built on spec
- Spending phase
- Spim
- Spit
- Spoofing
- Spousal contributions
- Square footage
- Stafford Loan
- Stafford loans
- Standard card
- Standard deduction
- Standard mileage rate
- Standard Payment Calculation
- Standby loan commitment
- Start rate
- Starter home
- State tax ID or registration number
- Stated income/stated asset mortgage - SISA
- Statement
- Statement savings
- Statutory employee
- Steering
- Step-rate mortgage
- Sticker price
- Sticky downward
- Stock power
- Stock savings plan
- Stock screener
- Stockholder's equity
- Store of value
- Straight life annuity
- Strategic asset allocation
- Strike price
- Stripper
- Structured finance
- Student Aid Report (SAR)
- Student loan
- Student loan interest deduction
- Student Loan Marketing Association
- Sub prime borrower
- Sub prime mortgage
- Subagent
- Subcontractor
- Subindex
- Subject property
- Submortgage
- Subordinate financing
- Subordinate loan
- Subordinated
- Subordinated debt
- Subordination clause
- Subprime
- Subprime borrower
- Subprime credit card
- Subprime lender
- Subprime loan
- Subprime mortgage
- Subrogate
- Substandard health annuity
- Subvented lease
- Super sinker
- Superannuation
- Supplemental Educational Opportunity Grant (SEOG)
- Supplemental medical insurance
- Support test
- Surcharge
- Surrender charge
- Surrender fee
- Surtax
- Survery
- Survey
- Suspicious Activity Report - SAR
- Swap
- Sweat equity
- Sweep account
- Swing loan
- Synthetic ID fraud
- Synthetic lease
- Systematic withdrawal plan - SWP
- Systematic withdrawal schedule