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Accounting Integration

Property management accounting. Not your general ledger.

Fortress runs operations. Sage Intacct runs the books.

LIHTC, HUD, RD, PH, HOME and moreSOC 1 & 2 Compliant
Harborview Flats
Username
View Bank Deposit
Batch ID: DEP-2026-0714-03Period: 2026-07
Batch Total$8,555.00
Bank AccountOperations
Deposit Date07/14/2026
NoteDaily lockbox deposit
FARA Status:SentReference #:JE-104882
FARC Status:SentReference #:JE-104883
Type
Payment Batch
Payment ID
Date
Period
Amount
Batch
PB-4471
8842190
07/14/2026
2026-07
$1,845.00
Batch
PB-4471
8842191
07/14/2026
2026-07
$1,210.00
Single
---
8842204
07/14/2026
2026-07
$965.00
Batch
PB-4472
8842218
07/14/2026
2026-07
$2,340.00
Single
---
8842223
07/14/2026
2026-07
$780.00
Batch
PB-4472
8842231
07/14/2026
2026-07
$1,415.00
Number of items: 6Total Payments: $8,555.00
One less number to argue about

Two systems. One set of numbers.

A property management system that also tries to be a general ledger forces your investment, management, and construction entities into a box that doesn't fit. So we didn't build one.

Fortress OS runs

Everything that happens at the property

  • Rent roll and resident ledgers
  • Charges, payments, and deposits
  • Move-ins, move-outs, and transfers
  • Compliance and certifications
  • CAM estimates and reconciliation
Fortress OSFortress OS
Your accounting system runs

Everything your CFO signs their name to

  • The general ledger
  • Financial statements
  • Vendor payments and bills
  • Budgets and consolidations
  • The chart of accounts
Sage IntacctSage Intacct today. Your call tomorrow.

When the software does not connect cleanly to accounting, your team quietly becomes the integration.

Nobody applied for that job.

View our Integrations

Your Systems Work. The Gap Between Them Doesn't.

Somebody Types It Twice

The deposit posts in one system, then a person re-keys it into the other. The work isn't hard. It's just the same work, done again, by someone who already did it.

Two Systems, Two Answers

Operations says one number, accounting says another, and the meeting turns into an argument about which screen to believe instead of what to do next.

The Ledger Module Doesn't Fit

A ledger built only for property data has nowhere to put your investment, management, and construction entities. So they get forced into a shape that was never meant to hold them.

Month-End Runs on Nerve

Export a trial balance from the property system, reformat it, then re-key it into the ledger, all before the close deadline hits. If the numbers don't match, someone spends the rest of the day hunting for the one line that's off.

Move-Outs Go Quiet

A resident leaves, the final account statement says a refund is owed, and it waits on someone to notice and walk it over to accounting.

CAM Runs on Last Year's Guess

Estimates were set months ago, the real spend lives in the general ledger, and nobody reconciles the two until a tenant asks a question you can't answer yet.

Customer story
Walker & Dunlop client

They already liked their accounting system. That was the point.

A Miami investment group runs affordable, conventional, mixed-use, and commercial property in one portfolio. Their old system fought their accounting setup. Fortress connected to Sage Intacct, the system their team already preferred, and left the books exactly where they were.

Sage Intacct
Kept, not replaced
4
Property types, one system
Miami
Multi-use portfolio
Read the case study
Sage Intacct
The general ledger
Deposit journal entries
Daily and monthly entries
Final account statements
GL balances for CAM
Fortress OS
The rent roll

What Actually Moves Between the Two

Affinity Gardens
Username
AvidXchange
Sage Intacct
Bottomline
Hunter Warfield
Conservice
TransUnion
Fortress OS
01

Start With the Books You Already Keep

Fortress connects to the accounting system your team already picked, so nothing has to be migrated, rebuilt, or argued about first.

See every integration
02

A Deposit Posts. The Entries Follow.

03

Close the Period, Not the Books

04

Move-Outs Settle Themselves

05

Then the Data Comes Back

No more messy, manual bullsh*t

soooo, what makes Fortress OS different?

Generic platforms2 / 6
HUD
LIHTC
RD 515
TRACS
HOME
Section 8
Fortress OS6 / 6
HUD
LIHTC
RD 515
TRACS
HOME
Section 8

Built for affordable housing

Other tools make you bend to fit them. We built Fortress around how affordable housing actually runs. Every program. Every quirk.

Fortress OS
Payments
Connected
Compliance
Connected
Maintenance
Connected
Messages
Connected

Your systems finally talk to each other

Payments, compliance, maintenance, messages. All in sync. No double entry. No copy-paste tax. No swivel chair.

90 dayskickoff to go-live3× faster
Week 1Kickoff
Week 4Discovery
Week 7Configure
Week 10Train
Week 12Live
Industry avg
~9 months
Fortress OS
90 days

Live in 90 days, not next year.

Most switches drag on the better part of a year. Ours runs on a set 90-day plan, with a dedicated rep and dates your team can hold us to.

...and of course:

We're F'ing Awesome

Accounting FAQs

What operators ask before they let two systems share a number.

Contact Us

Keep your accounting system.Stop typing it twice.

Fortress syncs rent roll, deposits, and CAM with Sage Intacct.

LIHTC, HUD, RD, PH, HOME and moreSOC 1 & 2 Compliant